Grossi made the remarks in an interview with the Swiss newspaper Neue Zürcher Zeitung on Sunday.
Grossi said that inspectors have found no evidence suggesting Iran has hidden significant amounts of enriched uranium.
“Most of Iran’s enriched material is stored at the known facilities in Isfahan and Fordow, and to some extent in Natanz. A small portion may have been moved elsewhere,” he added.
Grossi expressed confidence that “a diplomatic solution will be found to the disputes surrounding Iran’s nuclear program.”
“Bringing all parties back to the negotiating table can save us from another round of bombings and attacks,” he further said.
IRNA