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, AFP reported.
The IAEA said it was able to access each of Iran's nuclear sites and verify that Iran has stayed within the limits set by the pact.
"Nothing that indicates that. cooperation from Iran or its attitude has changed since 5 November", read the report.
The issue has grown more complicated since the USA withdrew unilaterally in May from the deal and then re-imposed sanctions.
On that date, the U.S.re-imposed further oil and banking sanctions on Iran that were lifted under the 2015 deal but granted waivers to eight countries, including Japan and Turkey, to continue buying Iranian petroleum products without penalty for another six months.
Iranian Parliament Speaker Ali Larijani has called on the European Union to act "more independently" of the U.S., Iranian state media has reported.
Despite Washington's withdrawal, Iran has not left the deal yet, but stressed that the remaining signatories to the agreement have to work to offset the negative impacts of the United States pullout for Iran if they wanted Tehran to remain in it.
US National Security Advisor John Bolton vowed Tuesday to "squeeze" Iran "until the pips squeak", a week after a tough new round of sanctions came into force.
"The behavior of the USA president has caused problems not only for Iran, but also for Europeans, and has led to bewildering conditions at global level", Larijani said.
For his part, Head of Iran's Foreign Policy Strategic Council Seyed Kamal Kharrazi pointed to the regional issue especially U.S. pullout from Joint Comprehensive Plan of Action (JCPOA) and said, "under such circumstances, it is essential that Europe should live up to its commitments within JCPOA".