Officials said Secretary of State Mike Pompeo and the US's ambassador to the United Nations, Nikki Haley, would deliver the verdict on membership in the UN Human Rights Council in a joint appearance at the State Department on Tuesday.
The U.N. Human Rights Council was established in 2006 as a successor to the Human Rights Commission, which was criticized for politicized abuse and the unrepentantly oppressive practices of many member states, exactly as the Trump administration is criticizing the Human Rights Council today.
Haley is US President Donald Trump's envoy to the United Nations.
She said the council was "not worthy of its name", but added the U.S. was not retreating from its human rights commitments. In her remarks Tuesday, Haley specifically cited countries like Venezuela and the Democratic Republic of the Congo, both of which are members of the body.
Condemning the planned withdrawal from the United Nations group, Senator Chris Coons, a Democrat who serves on the Foreign Relations Committee, said the decision "sends a clear message that the Trump administration does not intend to lead the world when it comes to human rights".
"In the end, no speech and no structural reforms will save the members of the Human Rights Council from themselves".
Haley said a year ago Washington was reviewing its membership and called for reform and elimination of a "chronic anti-Israel bias".
But, he added: "What is clear is that the secretary-general is a strong believer in the human rights architecture of the United Nations and the active participation of all member states in that architecture".
Ms Haley said: "In doing so, I want to make it crystal clear that this step is not a retreat from our human rights commitments".
There are 47 countries in the Human Rights Council, elected by the U.N.'s General Assembly with a specific number of seats allocated for each region of the globe.
The council was formed in 2006, with the goal of helping to ensure human rights were upheld worldwide.
The council, according to the official, protects human rights abusers, allows them to serve on the Council and shows bias in rendering decisions. After a year off, Washington was re-elected in 2016 for its current third term. Item 7 on "Israel and the Occupied Palestinian Territories" has been part of the council's regular business nearly as long as it has existed.
The council last month voted to probe killings in Gaza and accused Israel of excessive use of force. It was only in 2009 that the US joined the organization under President Barack Obama, whose administration argued that USA membership could better steer it.