The move was announced at a global climate meeting in Bonn, Germany. It means the United States would be the sole U.N. member country outside the deal if President Trump makes good on his threat to pull out.
The United States ratified the 2015 Paris Agreement — aimed at limiting global warming to under 2 degrees Celsius (3.6 degrees F.) — before Trump took office.
A member of the Syrian delegation told fellow negotiators the accord would be signed "as soon as possible." The delegate's name and function weren’t immediately available.
Nicaragua acceded to the agreement last month.