After the reimposition of United Nations “snapback” sanctions on Iran on September 27, 2025, in connection with unfulfilled Iranian nuclear program control and inspection commitments, Washington moved quickly to announce the imposition of a set of unilateral sanctions to support the snapback UN sanctions for “significant non-performance” of Iran’s nuclear commitments on October 1.
https://www.neglobal.eu/new-u-s-iran-sanctions-for-recent-violent-repression-and-corruption/