France, Germany and the United Kingdom said on Sunday that the reimposition of United Nations sanctions on Iran was unavoidable after what they described as Tehran’s persistent breaches of the 2015 nuclear deal.
In a joint statement on Sunday, the so-called E3 foreign ministers said the snapback mechanism under UN Security Council Resolution 2231 had been triggered on August 28 and completed late on September 27, restoring six previous resolutions imposing international sanctions.
“We welcome the re-instatement since 20:00 EDT on 27 September of Resolutions 1696, 1737, 1747, 1803, 1835, and 1929 after completion of the snapback process,” the ministers said. “We urge Iran and all states to abide fully by these resolutions.”
The measures include restrictions on arms transfers, missile development and proliferation-related activities. They had been lifted in 2015 when Iran agreed to curb its nuclear program under the Joint Comprehensive Plan of Action (JCPOA).
The E3 said Iran had “exceeded all limits on its nuclear program” since 2019 and was now holding enriched uranium “48 times the JCPOA limit.”
According to a September 4 report by the International Atomic Energy Agency, Iran possesses 10 “significant quantities” of highly enriched uranium (HEU) outside of monitoring, an amount that “cannot exclude the possibility of manufacturing a nuclear explosive device.”
“Iran has no credible civilian justification whatsoever for its HEU stockpile,” the statement said. “No other country without a nuclear weapons program enriches uranium to such levels and at this scale.”
The ministers said they had made repeated efforts to avoid snapback, including invoking the JCPOA dispute resolution mechanism in 2020 and participating in talks aimed at restoring the deal in 2020 and 2021.
In July 2025, the E3 offered Iran a one-time extension of snapback if Tehran agreed to resume unconditional talks with Washington, return to compliance with its safeguards obligations and address its HEU stockpile. “Iran did not engage seriously with this offer,” they said.
On September 19, the UNSecurity Council rejected a resolution to maintain sanctions relief for Iran. “The outcome of the vote was an unambiguous no,” the ministers said, adding that the decision “sent a clear signal that all states must abide by their international commitments.”
The statement stressed that “the reimposition of UN sanctions is not the end of diplomacy.” It urged Tehran “to refrain from any escalatory action and to return to compliance with its legally binding safeguards obligations.”
France, Germany and the UK said they remained committed to working with all parties “towards a new diplomatic solution to ensure Iran never gets a nuclear weapon.”
