WASHINGTON — The Trump administration rebuked human rights watchdog organizations on Wednesday, blaming them in part for its decision this week to withdraw from the United Nations Human Rights Council.

In a scathing letter, Nikki R. Haley, the American ambassador to the United Nations, criticized the organizations for opposing her failed push last month for a General Assembly vote on changes to the council, the world’s most important human rights body.

“You put yourself on the side of Russia and China, and opposite the United States, on a key human rights issue,” she wrote to 18 organizations that criticized her attempt. “You should know that your efforts to block negotiations and thwart reform were a contributing factor in the U.S. decision to withdraw from the council.”

The United States withdrew from the council on Tuesday to protest its frequent criticism of Israel’s treatment of Palestinians. The United States now joins Iran, North Korea and Eritrea as the only countries that refuse to participate in the council’s meetings and deliberations.