Snapback Mechanism Explained: How UN Sanctions Could Return to Iran

The Snapback Mechanism, part of the 2015 Iran nuclear deal, allows UN member states to report major breaches of Iran’s nuclear commitments. Once triggered, it starts a structured 30-day process involving negotiations, expert consultations, and Security Council review. If unresolved, previous UN sanctions (2006–2010) can automatically return, including arms embargoes, uranium restrictions, asset freezes, travel bans, and cargo inspections. This tool gives Europe and other deal participants leverage to ensure Iran sticks to its commitments while leaving room for diplomacy.