“The Secretary-General would have much preferred for the United States to remain in the Human Rights Council,” Guterres’ spokesman, Stephane Dujarric, said in a brief statement shortly after the announcement.

“The UN's Human Rights architecture plays a very important role in the promotion and protection of human rights worldwide,” Dujarric added.

Nikki Haley, the U.S.’s UN envoy, told reporters at the State Department that the U.S. is making the exit because the 47-member Geneva, Switzerland-based body is “not worthy of its name,” pointing to its alleged “chronic bias” against Israel and inclusion of human rights abusers as council members.

“Many of these countries argue that the United States should stay on the Human Rights Council because American participation is the last shred of credibility that the council has. But that is precisely why we must leave,” Haley said, arguing that the council has become “hypocritical and self-serving”.

“Should it become reformed, we would be happy to rejoin it,” she added.

Haley and Secretary of State Mike Pompeo, who also made a brief statement, said the council includes some of the world's worst rights abusers, including China, Cuba, the Democratic Republic of the Congo and Venezuela, while overlooking rights abuses in hotspots across the globe.

"We take this step because our commitment does not allow us to remain a part of a hypocritical and self-serving organization that makes a mockery of human rights," Haley said. 

The HRC earlier this week issued a stern criticism of the Trump administration's "zero tolerance" immigration policy, which has resulted in the forced separation of alleged undocumented migrant parents from their children. 

Pompeo and Haley did not mention the rebuke, but Haley said "the council continues politicizing and scapegoating of countries with positive human rights records in an attempt to distract from the abusers in their ranks".