E3 Countries and Snapback Mechanism

The E3, comprising France, Germany, and the UK, have threatened to trigger the “snapback” mechanism of the United Nations (UN) sanctions against Iran. This ultimatum, delivered in a letter to UN Secretary-General António Guterres and the Security Council, demands that Iran either resume negotiations on its nuclear program or accept a deadline extension by the end of August 2025.

The threat stems from Iran’s continued non-compliance with the 2015 Joint Comprehensive Plan of Action (JCPOA), which lifted international sanctions in exchange for strict limitations on Iran’s nuclear activities. The E3’s action is legally justified under the terms of the deal.

How the “Snapback” Mechanism Works

The snapback mechanism is a key provision of the JCPOA that allows any of the original signatories (the E3, Russia, or China) to quickly reimpose all international sanctions against Iran if it is found to be in “significant non-performance” of its commitments. The process is designed to be difficult to block:

• Initiation: An E3 member sends a letter to the UN Security Council, claiming non-compliance by Iran.
• Vote: The Security Council has 30 days to vote on a resolution to continue the sanctions relief.
• Veto Power: This is where the mechanism gets its power. If any permanent member of the Security Council (like Russia or China) vetoes the resolution to continue sanctions relief, the sanctions are automatically “snapped back” into place. This bypasses the typical veto power that could be used to block the reimposition of sanctions

(Source: AIR)