"I regret [the] U.S. decision to disengage from [the] process leading to a United Nations global compact on migration", Miroslav Lajcak tweeted after the decision was announced.
Trump's decision to end America's "participation in the Global Compact on Migration" was disclosed on Saturday by the U.S. Mission to the United Nations. She believed the USA could influence the global negotiations on migration if it participated in the Mexico meeting, according to the magazine, but she was "ultimately overruled by the president".
The U.S. Ambassador to the United Nations, Nikki Haley, opposed the withdrawal, according to Foreign Policy.
The US participation in the process started past year "following the Obama Administration's decision to join the UN's New York Declaration on Migration", according to the United States Mission to the UN.
"The role of the United States in this process is critical as it has historically and generously welcomed people from all across the globe and remains home to the largest number of worldwide migrants in the world", Miroslav Lajčák said.
In a statement Saturday, Haley said that then-President Obama's decision to commit the U.S. to the process by signing the non-binding New York Declaration for Refugees and Migrants in September 2016 had come at the expense of America's interest.
Haley issued a statement Saturday, saying "America is proud of our immigrant heritage and our long-standing moral leadership in providing support to migrant and refugee populations across the globe".
U.S. Ambassador Nikki Haley addresses a U.N. Security Council meeting about the ongoing violence in Myanmar, against Rohingya Muslims on September 28, 2017 in New York City. These commitments are known as the New York Declaration for Refugees and Migrants.
Three days of preparatory talks begin in Mexico on Monday ahead of the start of formal negotiations in February over the non-binding pact.
Outlining the main objectives of the future compact, the IOM cited the 2030 Agenda for Sustainable Development, adopted by the UN General Assembly in 2015, that calls on countries to work together to "facilitate safe, orderly and regular migration".
Under Trump, the USA has taken hard line on immigration.
Under Trump, the USA has also withdrawn from many global commitments, including the Trans-Pacific Partnership trade deal, the Paris climate agreement and UNESCO, the U.N.'s culture and education agency.
U.N. Secretary-General Antonio Guterres regretted the US decision, his spokesman said on Sunday, but expressed hope the United States might re-engage in the talks.