The US is left 66 international organization. Trumped signed the executive order. They are considering more.
https://www.state.gov/releases/office-of-the-spokesperson/2026/01/withdrawal-from-wasteful-ineffective-or-harmful-international-organizations
Here's the list:
https://www.whitehouse.gov/presidential-actions/2026/01/withdrawing-the-united-states-from-international-organizations-conventions-and-treaties-that-are-contrary-to-the-interests-of-the-united-states/

Shame for couple of UN ones. They probably did to favor Israel.