Editor's Note: This story has been updated to reflect new developments, including Trump's claim on Monday night that he is planning to temporarily suspend immigration to the US. It originally published on March 18, 2020.

Washington (CNN) The Trump administration has made sweeping changes to the country's immigration apparatus as the US responds to the coronavirus pandemic , altering daily operations and disrupting the lives of thousands.

And there's more to come. Late Monday, President Donald Trump said he will sign an executive order temporarily suspending immigration to the US. He did not provide additional details. But immigration to the United States has largely been cut off amid the pandemic.

In a little over a month, there have been more than a dozen changes to the system, ranging from postponing immigration hearings to pausing deportation flights to certain countries to swiftly removing migrants arrested at the border and suspending refugee admissions. The tweaks to the system are being made incrementally, though rapidly, as the pandemic continues to spread across the country.

Against the backdrop of the outbreak, the Trump administration is also trying to move forward with some of its most restrictionist policies it has struggled to be put into practice, including blocking entry to asylum seekers.

Below is a list of the changes to the immigration system.

US extends travel restrictions with Canada and Mexico

April 20: Acting Department of Homeland Security Secretary Chad Wolf extended restrictions on non-essential travel on the northern and southern border. The restrictions were set to expire after being in place for nearly a month.

The administration also extended authorities that allow the US to immediately expel migrants encountered at the border, including children. CBP said earlier this month it is expelling 80% of everyone encountered in less than two hours.

Administration says it is temporarily amending visa requirements for foreign workers

April 15: The change is designed to help US agricultural employers who rely on foreign workers. Qualified employers who are concerned workers will be unable to enter the US due to travel restrictions can employ those already in the US with a certain visa status.

Among the reasons listed by the Department of Homeland Security and Department of Agriculture for the temporary rule change is protecting the nation's food supply chain.

White House issues memo allowing State Department to impose visa sanctions on countries that don't repatriate citizens during the pandemic

April 10: The White House The White House released a memorandum that enables visa sanctions if a country refuses to repatriate its citizens, arguing that not accepting them poses a risk to the US amid the coronavirus pandemic.

"Countries that deny or unreasonably delay the acceptance of their citizens, subjects, nationals, or residents from the United States during the ongoing pandemic caused by SARS-CoV-2 create unacceptable public health risks for Americans," the memo reads. "The United States must be able to effectuate the repatriation of foreign nationals who violate the laws of the United States."

Guatemala has raised concerns over repatriation flights. Late last month, a Guatemalan man who was deported from the US tested positive for coronavirus. Guatemalan officials have since warned of more positive cases among deportees and suspended flights for the time being.

The memo notes that the orders are temporary and, "shall cease to apply on December 31, 2020, unless extended."

ICE releases detainees on a case-by-case basis

April 7: Immigration and Customs Enforcement notified congressional staff that it was reviewing cases of individuals in detention who may be vulnerable to the coronavirus following repeated calls from lawmakers to release detainees.

The agency said that it instructed its field offices to "further assess and consider for release certain individuals deemed to be at greater risk of exposure, consistent with CDC guidelines, reviewing cases of individuals 60 years old and older, as well as those who are pregnant."

"Additionally, efforts to identify other individuals who may be more vulnerable to COVID-19, based on risk factors identified by the CDC, other than age and pregnancy, are ongoing, based on the recommendations of CDC," ICE said.

Acting Deputy Secretary of Homeland Security Ken Cuccinelli has since told reporters that ICE released nearly 700 people from custody after conducting medical reviews stemming from concerns about the coronavirus.

Trump administration extends postponement of immigration hearings for "remain in Mexico" cases

April 1:The Trump administration extended the postponement of immigration hearings scheduled through May 1 for migrants waiting in Mexico, according to a joint statement from the Department of Homeland Security and Justice Department.

All scheduled hearings will be rescheduled.

Thousands of migrants are waiting in Mexico for their immigration court date in the US as part of the administration's so-called "remain in Mexico" policy.

Border agency says unaccompanied migrant children will be subject to new border rules

March 30: Customs and Border Protection, an agency within DHS, said in a statement that Customs and Border Protection, an agency within DHS, said in a statement that minors could be included in new coronavirus restrictions on the border , meaning children who arrive alone at the border could be sent to their origin country instead of turned over to the Health and Human Services Department, which is typically charged with their care. Initially, the agency said children would be exempt.

Of the more than 6,000 migrants expelled in March under the new restrictions, 299 were children who arrived alone and 393 were family members.

State Department suspends routine visa services

March 20: The department, citing worldwide challenges related to the Covid-19 pandemic, The department, citing worldwide challenges related to the Covid-19 pandemic, temporarily suspended routine visa services at US embassies and consulates. Services to US citizens continue to proceed.

The State Department later updated its guidance to tell foreign medical professionals with approved visa petitions, or who are eligible for an approved exchange visitor program, to request an appointment at their nearest embassy or consulate.

US and Mexico limit cross-border travel

March 20: The US and Mexico announced they're limiting nonessential travel across their shared border to curb movement during the pandemic. Exceptions include traveling for medical purposes or work, or to attend school, among others, The US and Mexico announced they're limiting nonessential travel across their shared border to curb movement during the pandemic. Exceptions include traveling for medical purposes or work, or to attend school, among others, according to a regulation notice set to be published March 24

The US also took the step of barring entry to migrants illegally crossing the southern border. At the direction of the Centers for Disease Control and Prevention, the Department of Homeland Security will suspend entry of all migrants "seeking to enter the US without proper travel documentation" -- for both the northern and southern border, acting Secretary Chad Wolf said.

Migrants who are apprehended at the border will either be quickly removed or repatriated to their origin countries.

ICE changes immigration enforcement operations

March 18: ICE told congressional staffers that it has temporarily adjusted its "enforcement posture," according to a memo obtained by CNN, marking a change in operations as a result of the pandemic. The agency said it will focus on those who pose a public safety risk and are "subject to mandatory detention based on criminal grounds."

Immigrant advocates have called on ICE to dial back operations amid the coronavirus outbreak, arguing that the agency has instilled fear in the immigrant community and might discourage some from seeking medical attention.

The agency said in its memo to staffers that it will not carry out enforcement operations at or near health care facilities, "except in the most extraordinary circumstances," adding that individuals should not avoid seeking medical care over fears of enforcement.

DOJ closes more immigration courts, postpones hearings

March 18: The Justice Department The Justice Department closed an additional 10 immigration courts , spread across the country and postponed all hearings of cases of immigrants who are not in detention. The Justice Department's Executive Office for Immigration Review, which oversees the immigration courts, had previously made incremental changes, to the frustration of immigration judges, lawyers, and Immigration and Customs Enforcement prosecutors, who urged the administration to close courts for the safety of staff and immigrants.

Refugee admissions paused

March 18: The United States The United States paused refugee admissions . The move comes after the International Organization for Migration, which is in charge of booking refugees' travel, and the UN refugee agency announced a suspension of resettlement travel. The agencies shared concerns in a statement, saying international travel "could increase the exposure of refugees to the virus."

ICE suspends some deportation flights

March 18: ICE told CNN that removal flights to Italy, China and South Korea have been suspended. While the situation is quickly evolving, however, ICE is continuing to deport immigrants. Prior to boarding, however, immigrants undergo a temperature screening. Anyone with a temperature of 100.4 degrees or higher is referred to a medical provider, according to ICE told CNN that removal flights to Italy, China and South Korea have been suspended. While the situation is quickly evolving, however, ICE is continuing to deport immigrants. Prior to boarding, however, immigrants undergo a temperature screening. Anyone with a temperature of 100.4 degrees or higher is referred to a medical provider, according to ICE's website . ICE has since updated its guidance to include any detainee with a temperature of 99 degrees or higher.

USCIS suspends in-person services

March 17: US Citizenship and Immigration Services US Citizenship and Immigration Services announced it's suspending its in-person services , including all interviews and naturalization ceremonies, to help mitigate the spread of coronavirus. USCIS is responsible for administering the nation's legal immigration system, including green cards, citizenship and asylum and refugee processing. It administers naturalization ceremonies across the country -- one of the most public and cherished duties the agency carries out. The suspension remains in effect.

ICE reschedules in-person check-ins and pushes back timeline for recent arrivals

March 17: ICE notified congressional staffers that it will temporarily reschedule in-person appointments of immigrants who are not in detention to "minimize the impact" of coronavirus. The agency will also allow those recently released from the southern border to check in at 60 days, instead of 30 days.

Guatemala says it's suspending asylum agreement with US

March 17: An asylum agreement between the United States and Guatemala was suspended out of caution over the coronavirus, An asylum agreement between the United States and Guatemala was suspended out of caution over the coronavirus, Guatemala's government announced , a setback for the Trump administration, which has increasingly relied on its accord with the country to curb asylum. The move came a day after Alejandro Giammattei, president of Guatemala, said the country was closing its borders in an attempt to prevent the virus's spread.

US extends travel restrictions to the UK and Ireland

March 16: Americans, legal permanent residents and their immediate families returning from Ireland and the United Kingdom began to be funneled into 13 select US airports, where they went through enhanced screening, Americans, legal permanent residents and their immediate families returning from Ireland and the United Kingdom began to be funneled into 13 select US airports, where they went through enhanced screening, according to the Department of Homeland Security . The two countries had been initially excluded from travel restrictions related to coronavirus.

ICE announces a temporary end to social visitation at detention facilities

March 13: ICE said it ceased social visitation in all of its detention facilities. The agency had previously announced that it had put protocols in place, in accordance with guidance from the Centers for Disease Control and Prevention, to protect staff and detainees.

US implements Europe travel restrictions

March 13: The Trump administration The Trump administration added more countries to its list of travel restrictions to curb the spread of the coronavirus. Earlier this year, the administration had restricted travel from China and Iran. Most foreign nationals who were in Europe's Schengen Area -- 26 countries stretching from Iceland to Greece -- in the past 14 days are barred from entering the US. American citizens, green card holders and immediate family members are exempt from the travel ban but will face additional health screening and restrictions when they arrive. The restrictions led to prolonged wait times at select airports, with passengers squeezed together and waiting to get through US customs, after returning from overseas.

Migrant children no longer placed in Washington state and California

March 10: The Office of Refugee Resettlement, the federal agency tasked with the care of migrant children, The Office of Refugee Resettlement, the federal agency tasked with the care of migrant children, temporarily stopped placing kids who arrive in the US without parents or guardians in shelters in California and Washington state, unless in limited circumstances. The Health and Human Services Department funds a network of more than 100 facilities where migrant children are cared for until they're released to sponsors in the United States. The children are turned over to HHS after being taken into custody by the Department of Homeland Security.

The agency has also since stopped placements in New York.