The last US-mediated peace talks took place in February before the United States and Israel launched a war against Iran.
US envoy Steve Witkoff said on X the new Abu Dhabi discussions on Tuesday and Wednesday will cover "post-war security agreements, de-escalation, humanitarian measures, and ending the war".
US negotiators will meet later this week in Brussels with representatives from France, Germany, the United Kingdom, the European Union and NATO, he said.
Those talks would "discuss security guarantees for Ukraine, Europe's post-war security architecture, and economic opportunities to support Ukraine's reconstruction," he wrote.
Witkoff and Jared Kushner are expected to represent the US in Abu Dhabi.
Russian President Vladimir Putin agreed to a new round of trilateral talks after meeting Witkoff in St Petersburg two weeks ago in the latest US push to stop Europe's bloodiest conflict since World War Two.
The announcement came after Russia bombed a school that was being used as an aid distribution point in a village in Ukraine's southeastern Zaporizhzhia region, killing 26 people.
The emergency services said two members of a rescue crew and four police officers were among the dead in the village of Komyshuvakha on Monday.
President Volodymyr Zelenskiy said Russian forces dropped bombs on a school in the village, used as a shelter and for distributing humanitarian assistance.
"The Russians struck first just as people were arriving - a few aerial bombs," he said.
"Then there was a second strike - more air bombs, this time on the shelter. A vile terrorist strike."
The attack, he said, showed Moscow was intent on killing people instead of building on the past week's humanitarian mission in the embattled southern city of Oleshky.
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