The United States withdrew from the United Nations Human Rights Council on Tuesday accusing it of a "chronic bias against Israel," a move that activists warned would make advancing human rights globally even more difficult.
Standing with US Secretary of State Mike Pompeo, Haley slammed Russia, China, Cuba and Egypt for thwarting US efforts to reform the council. She also criticized countries which shared US values and encouraged Washington to remain but "were unwilling to seriously challenge the status quo."
The United States is half-way through a three-year term on the main UN rights body and the Trump administration had long threatened to quit if the 47-member Geneva-based body was not overhauled.
"Look at the council membership, and you see an appalling disrespect for the most basic rights," said Haley, citing Venezuela, China, Cuba and Democratic Republic of Congo.
Haley also said the "disproportionate focus and unending hostility toward Israel is clear proof that the council is motivated by political bias, not by human rights."
Washington's withdrawal is the latest US rejection of multilateral engagement after it pulled out of the Paris climate agreement and the 2015 Iran nuclear deal.
It also comes as the United States faces intense criticism for detaining children separated from their immigrant parents at the US-Mexico border. UN High Commissioner for Human Rights Zeid Ra'ad al-Hussein on Monday called on Washington to halt its "unconscionable" policy.
Rights groups have criticized the Trump administration for not making human rights a priority in its foreign policy. Critics say this sends a message that the administration turns a blind eye to human rights abuses in some parts of the world.
Diplomats have said the US withdrawal from the body could bolster countries such as Cuba, Russia, Egypt and Pakistan, which resist what they see as UN interference in sovereign issues.
Among reforms the United States had been seeking was to make it easier to kick out member state with egregious rights records.
Haley said the US withdrawal from the Human Rights Council "is not a retreat from our human rights commitments."
Twelve rights and aids groups, including Human Rights First, Save the Children and CARE, wrote Pompeo to warn the withdrawal would "make it more difficult to advance human rights priorities and aid victims of abuse around the world."
"The US's absence will only compound the council's weaknesses," they wrote.
Jamil Dakwar, director of the American Civil Liberties Union's Human Rights Program, said Trump's "misguided policy of isolationism only harms American interests and betrays our values as a nation."
Jewish rights group the Simon Wiesenthal Center applauded the US withdrawal and urged other countries to do the same.
Reuters reported last week that talks on reforming the council had failed to meet Washington's demands, suggesting the Trump administration would quit.
The council meets three times a year to examine human rights violations worldwide. It has mandated independent investigators to look at situations including Syria, North Korea, Myanmar and South Sudan. Its resolutions are not legally binding but carry moral authority.
Speaking before the US announcement, UN spokesman Stephane Dujarric said Secretary-General Antonio Guterres "is a strong believer in the human rights architecture of the UN and the active participation of all states."
When the Council was created in 2006, US President George W. Bush's administration shunned the body.
Under President Barack Obama the United States was elected for a maximum two consecutive terms on the council by the UN General Assembly. After a year off, Washington was re-elected in 2016 for its current third term.
In March 2011, the U General Assembly unanimously suspended Libya's membership in the council because of violence against protesters by forces loyal to Libyan leader Muammar Gaddafi. But UN officials said no member has withdrawn.
Haley said a year ago Washington was reviewing its membership and called for reform and elimination of a "chronic anti-Israel bias." The body has a permanent standing agenda item on suspected violations committed by Israel in the occupied Palestinian territories that Washington wanted removed.
The council last month voted to probe killings in Gaza and accused Israel of using excessive force. The United States and Australia cast the only "no" votes.
"The UN Human Rights Council has played an important role in such countries as North Korea, Syria, Myanmar and South Sudan, but all Trump seems to care about is defending Israel," said Human Rights Watch executive director Ken Roth.