The meeting with Zelenskyy is expected to be about the war in Ukraine, while the meeting with al-Sharaa is expected to revolve around Syria's role in the Middle East.
On X, Zelenskyy writes that US determination is crucial to ending the war in Ukraine. He adds that talks with the US will be held in Ankara at the summit.
An anonymous senior American official says it is in Trump's interest to end the war in Ukraine.
It is unclear what the talks with Ahmad al-Sharaa will be about. But Trump has said that Syria could have a bigger role in the US and Israel's fight against the Iran-backed Hezbollah movement in Lebanon.
Al-Sharaa, for his part, has said that he is happy to maintain a good relationship with Lebanon.
