According to the International Atomic Energy Agency's latest report, Iran had been complying with the restrictions to its nuclear program laid down in the 2015 Joint Comprehensive Plan of Action (JCPOA) as of early November.
The report said that as of Nov 4, Iran's stockpiles of low-enriched uranium stood at 149.4kg, 10kg up from the time of its last report in August.
A senior diplomat with knowledge of the situation said that there is "nothing that indicates that... cooperation from Iran or its attitude has changed since November 5".
While the IAEA has repeatedly confirmed Iran’s commitment to the nuclear deal, the US president pulled his country out of the JCPOA in May and reimposed all of the sanctions on Iran that had been lifted after coming into force of the agreement.
A first round of American sanctions took effect in August, and the second round on November 4.