“After he failed to depart within the timeline of the agreement, he became subject to a final order of removal in 2009,” the statement said. “ICE exercised prosecutorial discretion on multiple prior occasions in Mr. Garcia-Martinez’s case in 2011, 2012 and 2014.”

Mr. Garcia’s deportation was continually delayed during his annual meetings with immigration officials, Ms. Garcia said.

“They knew we were trying to fix his status,” Ms. Garcia said.

This year, however, was different.

“The officer told us because of the new Trump administration, because he had an order of supervision and an order of deportation, he had to leave,” Ms. Garcia said.

In fiscal year 2017, which ended on Sept. 30, ICE removed 226,119 unauthorized immigrants, which is nearly 6 percent fewer than the number deported in 2016 under President Barack Obama, and 45 percent fewer than in 2012, when Mr. Obama deported an unpredecented 409,849 people.

The number of unauthorized immigrants arrested, however, has risen during the Trump administration. In fiscal year 2017, ICE conducted 143,470 immigration-related arrests, 30 percent more than in 2016.

Mr. Obama created the Deferred Action for Childhood Arrivals program, or DACA, in 2012 to protect “Dreamers” — young immigrants who, like Mr. Garcia, were brought to the country illegally as children. The program does not apply to Mr. Garcia, however, because of its age limit.