"The secretary-general strongly supports the JCPOA as an important diplomatic achievement and is also open on building on the JCPOA," Dujarric told reporters. "The secretary-general has made his views known both publicly and privately… We believe the JCPOA contributes to regional peace and security."
Guterres' statement comes after the foreign ministers of Germany, the United Kingdom and France have issued a joint statement saying that their countries will stay in the JCPOA even if the United States pulls out of it.
The US president has been criticizing the JCPOA, more widely known as the Iran nuclear deal, which was negotiated by his predecessor then-President Barack Obama, ever since his election campaign. Trump threatened to withdraw Washington from the agreement if the "flaws" in it are not fixed. The United States is expected to announce its decision on the agreement before the May 12 deadline.