Iran’s top security council has warned that recent moves by France, Germany, and the United Kingdom to reimpose UN sanctions could “effectively suspend” Tehran’s cooperation with the International Atomic Energy Agency (IAEA).

The Supreme National Security Council made the statement on Saturday, following the failure of the UN Security Council to adopt a resolution permanently lifting sanctions against Iran.

The warning comes after the three European nations—known as the E3—triggered a 30-day process on August 28 to reinstate “snapback” sanctions, alleging that Iran violated its 2015 nuclear deal commitments. Russia and China have opposed the European push.

The council described the E3’s actions as “ill-considered,” saying they undermine months of engagement with the IAEA to resume inspections and ensure compliance. It directed the foreign ministry to continue consultations to safeguard Iran’s national interests.

Earlier this month, Iran and the IAEA had reached an agreement in Cairo to resume inspections at nuclear sites, including facilities targeted by the US and Israel.

Iranian Deputy Foreign Minister Kazem Gharibabadi warned that the deal could collapse if diplomatic progress is not achieved.

Under the 2015 Joint Comprehensive Plan of Action (JCPOA), Iran had agreed to limit its nuclear program in exchange for sanctions relief. The deal unraveled in 2018 when the US withdrew and reimposed sanctions. The IAEA recently reported that Iran now possesses over 400 kg of uranium enriched to 60 percent purity, just below weapons grade, though Tehran maintains its nuclear program is peaceful.

If implemented, the snapback sanctions could restore an arms embargo, ban uranium enrichment and missile activities, and impose asset freezes and travel restrictions on Iranian individuals and entities as early as next Sunday.

The E3 had offered to delay enforcement for up to six months if Iran allowed full inspector access and entered talks with Washington.

Responding defiantly, Council Chair President Masoud Pezeshkian vowed that Iran would “overcome any obstacles” and reaffirmed that the country would not yield to external pressure.

He also pledged that Iranian specialists would rebuild nuclear sites damaged by previous US-backed Israeli attacks.