Trump said on Sunday that he expected good results out of the upcoming talks, adding that the United States had "just about" ended a suspension of intelligence sharing with Kyiv.
Trump special envoy Steve Witkoff, who has been arranging the talks, has said the idea is to "get down a framework for a peace agreement and an initial ceasefire as well."
Zelenskyy has called for a truce in the air and at sea, as well as a prisoner exchange, in what he says could be a test of Russia's commitment to ending the war.
Moscow has rejected the idea of a temporary truce, which has also been proposed by Britain and France, saying it was a bid to buy time for Kyiv and prevent its military collapse.