"Tehran is ready to restore the Joint Comprehensive Plan of Action, but its realization requires serious negotiations," Behrouz Kamalvandi was quoted by the Iranian news agency ISNA as saying.
It reneged on some of the commitments after the US withdrew from the JCPOA and reimposed sanctions on Iran in 2018, causing the pact to collapse.
In 2021, Iran allowed the UN nuclear watchdog IAEA to replace cameras at a nuclear facility in the city of Karaj, but said it would not share the footage with the agency until the US lifted its sanctions.