According to a Memorandum of Understanding (MoU) signed on June 16, 2026, Iran has agreed to dilute its enriched uranium stockpile to 3.67% purity under the supervision of the International Atomic Energy Agency (IAEA). The agreement, brokered in Vienna, aims to address international concerns over Iran's nuclear program.
The MoU stipulates that upon signing, a mechanism will be established for the United States to release frozen Iranian assets and funds. The exact amount and timeline for the fund release are to be negotiated, but the deal is seen as a step toward de-escalation.
IAEA Director General Rafael Grossi confirmed that inspectors will have access to key nuclear facilities in Iran to verify the dilution process. The agreement does not cover other aspects of Iran's nuclear activities, such as enrichment at Fordow or Natanz, but is limited to the existing stockpile.
Iranian officials stated that the dilution is a voluntary confidence-building measure, while the US emphasized that sanctions relief is conditional on full compliance. The deal has been welcomed by European mediators but criticized by some US lawmakers who argue it does not address ballistic missile development.
