The latest news over the nuclear crisis between Iran and the United States is that Iran has rejected an offer to meet with American negotiators. The European offer to hold direct US-Iran talks to settle the 2015 nuclear deal between Iran and the five permanent members of the United Nations plus Germany is not the last opportunity for all sides to resolve differences, but most observers believe the window is closing fast.
Iran wants a guarantee of sanctions removal before talking, arguing they are still in the Joint Comprehensive Plan of Action (JCPOA) and it is the United States that has exited and reapplied sanctions. Iran, which has weathered almost three years of maximum pressure under Donald Trump, is not publicly signaling they are ready to compromise outside of the framework of the JCPOA.