The following is a selection of reactions from around the globe to Trump's biggest foreign policy move since taking office.
President Hassan Rouhani also said Iran could resume uranium enrichment without limit in response to Trump's announcement.
Despite calls from many of its allies, Trump announced Tuesday he was pulling the US out of the 2015 agreement.
Moscow condemned Trump's decision as proof of Washington's inability to negotiate alleging that US criticism of Iran's legal nuclear activity was just a smokescreen for settling political scores.
Syria said its ally would overcome what it called US "aggression", state media reported.
The deal was reached between Iran and six world powers -- Britain, China, France, Germany, Russia and the United States, imposing curbs to Iran's nuclear program in exchange for sanctions relief.
US President Donald Trump is widely expected to announce Tuesday that he is pulling out of what he has called a 'very badly negotiated' deal with Tehran and possibly reimpose economic sanctions.
By the close of business Friday, Trump is expected to declare that a landmark agreement curbing Iran's nuclear program is no longer in the US interest.
Donald Trump has backed away from a campaign promise to scrap a major nuclear security deal with Iran.