The US government identified Sgt William Jerome Rivers, 46, Specialist Kennedy Ladon Sanders, 24, and Specialist Breonna Alexsondria Moffett, 23, as the troops killed in a drone attack in Jordan.
The US attributed the attack to Iranian-backed groups, with the Pentagon suggesting Hezbollah involvement.
The drone used was reported to be Iranian-made, resembling a type of Shahed drone.
Iran denies supporting the groups responsible.
The attack occurred in Rukban, near the Syrian border, with over 40 military personnel injured.
The US expressed a willingness to respond but emphasized a desire to avoid war with Iran.
