SINGAPORE – Only three U.S. officials will join President Trump on Tuesday when he meets with North Korean leader Kim Jong Un, according to a person familiar with the president's plan.

The pivotal summit will begin with a one-on-one meeting between the president and Kim, during which each leader will be accompanied by a translator. Trump told reporters on Saturday he expects to know "within the first minute" of meeting his North Korean counterpart whether he intends to surrender his cache of nuclear weapons.

If all goes well during that initial interaction, Trump will welcome in U.S. Secretary of State Mike Pompeo, White House chief of staff John Kelly, and national security adviser John Bolton, whose talk of modeling denuclearization after Libya left North Korean officials infuriated last month. Kim is likely to include his top aide Kim Yong Chol, whom Trump and Pompeo both met with during his visit to the U.S. at the beginning of June.

Many expect Pompeo to take the lead on negotiations with North Korea if the U.S. secures a firm commitment to denuclearization from Kim during the summit here on Tuesday. The former CIA director is the only Trump administration official who has personally met with Kim ahead of Tuesday's summit, a meeting that happened when Pompeo took a secret trip to Pyongyang over Easter.

Kim and Trump will meet separately with Singapore Prime Minister Lee Hsien Loong on Sunday and Monday, before convening at the Capella Hotel for their own bilateral discussion. Despite saying he will walk away from his meeting with Kim if it appears he's wasting his time, Trump told reporters over the weekend that he is optimistic about the reclusive leader's desire to make changes.

"This is a leader that’s really an unknown personality, people don’t know much about him. I think that he’s going to surprise on the upside, very much on the upside," he said.

However, White House officials expect Trump to return to the fiery rhetoric

he first used against Kim if he loses confidence in the chances of a deal on denuclearization.

In that case, Trump himself has said he would revert to using the phrase "maximum pressure campaign," which he's intentionally shied away from ahead of his summit with Kim.