A bit old, but Iran put out a fact sheet a few months back titled Fact Sheet on Iran’s Reduction of Some JCPOA Commitments. It’s worth reading if you want to understand Tehran’s articulated reasoning behind its decision to decrease implementing the JCPOA-mandated restrictions concerning Iran’s nuclear program.
I like this paragraph, but read the whole thing:
Since taking office as the US President, Donald Trump has been seeking to scupper the Iran nuclear deal known as the Joint Comprehensive Plan of Action (JCPOA), arguing it has been the “worst and most embarrassing agreement in the United States” history”.
He tried for so long to make Iran violate the JCPOA to shift the responsibility for scuppering the deal on the Islamic Republic and revive an international consensus against Tehran. This plot against international peace and security was thwarted thanks to Iran”s strategic restraint, vigilance and constant compliance with the JCPOA.