**Diplomatic efforts to resolve the US-Iran conflict remain stalled over Iran’s highly enriched uranium stockpile, with Tehran repeatedly declaring it will not permit any of the material—estimated by the IAEA at roughly 440 kilograms enriched to 60 percent prior to the June 2025 strikes—to leave the country.** Iran has barred IAEA inspectors from key sites including the Isfahan tunnel complex where much of the stockpile is believed buried, citing ongoing US military threats, and has rejected proposals for third-party removal such as those floated by Russia. US officials continue to seek verifiable reductions in enrichment capacity and inspector access as conditions for any broader agreement involving sanctions relief or asset releases, while mediators including Qatar explore interim arrangements. Recent IAEA reporting underscores the loss of continuity of knowledge on the stockpile, keeping the prospect of US acquisition dependent on unresolved negotiations or further military developments.