The European Troika, France, the United Kingdom, and Germany, voiced on Saturday their dissatisfaction with Iran's demands in the Vienna talks aimed at reviving the Iran nuclear deal, formally known as the Joint Comprehensive Plan of Action (JCPOA).

Iran chose not to use a critical diplomatic opportunity and instead chose to continue escalating its nuclear program, the E3 said in a statement. "Iran's stance goes against its legally-binding international commitments and threatens the probability of the JCPOA working."

Iran must fully cooperate without delay with the International Atomic Energy Agency in goodwill, the statement added. "It is up to Iran to give technically accurate answers to the IAEA's questions relating to the location of all nuclear materials."

The JCPOA, the E3 added, cannot be used to enable Iran to avoid committing to its legally-binding international commitments, noting that Iran's rejection of entering the proposed deal would prompt the three European states to consult their allies on ways to respond to Tehran's "nuclear escalation".

France, the United Kingdom, and Germany announced in a tripartite statement today, Saturday, that "the final text drafted by the European Union regarding the Iran nuclear agreement included amendments that provided the maximum flexibility."  

The European Union presented, on August 8, what it called a final text to restore the 2015 nuclear agreement.

Iranian FM Hossein Amir-Abdollahian underlined that Iran has demonstrated its goodwill and seriousness in order to reach a strong and sustainable deal.

It is noteworthy that US State Department Spokesperson Vedant Patel claimed that a new response from Iran on reviving a landmark nuclear deal was "not constructive".

"We can confirm that we have received Iran's response through the EU," he said. "We are studying it and will respond through the EU, but unfortunately it is not constructive," he added.

It is noteworthy that in late August, Iran's top diplomat Foreign Minister Hossein Amir-Abdollahian demanded that the IAEA drop the issue of what the Western parties claim to be "undeclared sites", as momentum builds to revive a 2015 nuclear deal.

In June, the IAEA's board of governors adopted a resolution censuring Iran for failing to adequately explain the previous discovery of traces of enriched uranium at three sites allegedly "not declared by Tehran" as having hosted nuclear activities.