Many UN organisations, including the World Health Organisation and the International Organisation for Migration, have slashed spending this year because some donors have cut back foreign aid.
The UN human rights chief said on Wednesday that his office is facing a $90 million (€77 million) funding shortfall this year and staff cuts would amount to around 300 posts, or about 15%, over the course of the year.
Volker Türk, the UN high commissioner for human rights, says the Geneva-based office was in "survival mode" at a time when major donors, including the UK, Finland, France and the United States, have lowered their contributions.
"Our resources have been slashed along with funding for human rights organisations, including at the grassroots level around the world," Türk told reporters on Human Rights Day.
"We are in survival mode."
"My office has had about $90 million less than we needed this year, which means around 300 jobs have been lost and essential work has had to be cut," in countries like Colombia, Conga, Myanmar and Tunisia, he said, "at a time when the needs are rising."
The rights office had an approved budget from member states of $246 million (€211 million) this year, but received $67 million (€57 million) less than that, spokeswoman Marta Hurtado Gomez said in an email.
Additionally, the office had appealed for extra-budgetary, or voluntary, funding for $500 million (€428 million), but has received half that.
It is expected to have spent $273 million (€234 million) by year's end, which means a deficit of another $23 million (€19 million).
Many UN organisations, including the World Health Organisation, the UN refugee agency and the International Organisation for Migration, have slashed jobs and spending this year because some top donors have not paid their UN dues in full or cut back foreign aid.
Those other organisations have annual budgets in the billions and far larger staffs than the rights office.
"We are all affected," Türk said, adding that his office has been "disproportionately affected...in the sense that if you cut what is already very scarce, and if you cut this even further, then obviously it has a huge impact."
After beginning the year with about 2,000 employees, the rights office has already cut 230 posts this year and is expected to cut between 70 and 80 more by the end of 2025.