The two leaders were starting their day by taking part in a virtual meeting with fellow leaders of the Group of Seven economies to discuss the war.
Trump is set to hold a meeting Thursday with another key European leader, British Prime Minister Keir Sttarmer.
Their visits come after Trump shook Europe with repeated criticism of Ukrainian President Zelenskyy for failing to negotiate an end to the war and rebuffing a push to sign off on a deal giving the U.S. access to Ukraine's rare earth minerals, which could be used in the American aerospace, medical and tech industries.
European leaders also were dismayed by Trump's decision to dispatch top aides for preliminary talks with Russian officials in Saudi Arabia without Ukrainian or European officials at the table.
On the minerals deal, Zelenskyy initially bristled, saying it was short on security guarantees for Ukraine. He said Sunday on X that “we are making great progress“ but noted that "we want a good economic deal that will be part of a true security guarantee system for Ukraine.”
Trump administration officials say they expect to reach a deal this week that would tie the U.S. and Ukrainian economies closer together.
