From Grok:
Yes, Iran has violated the Iran nuclear deal (formally the Joint Comprehensive Plan of Action, or JCPOA, agreed in 2015). While Iran complied with the deal’s core nuclear limits for the first few years after its implementation in 2016 (as repeatedly verified by the International Atomic Energy Agency, or IAEA), it began systematically breaching those limits starting in 2019.
Context of the Violations
Iran framed its actions as a response to the U.S. withdrawal from the JCPOA in May 2018 under President Trump and the reimposition of sanctions, which other parties (including Iran) viewed as a U.S. violation of the agreement. Iran argued it was exercising its right under the deal’s dispute mechanism to reduce compliance. However, the breaches went well beyond temporary or reversible steps and accumulated over time, exceeding JCPOA caps on multiple fronts.