"The JCPOA was a deal that we felt was the best possible deal that was achievable, none of us ever pretended that it was a perfect deal, but actually, it did deliver a number of important measures as I think everyone benefits from. So, we really just encourage the United States to start talking to its partners and Iran in order to be able to find a route forward," Williamson said.
On Monday, the US government re-imposed the first wave of sanctions against Iran that were lifted under the JCPOA. The remaining sanctions will be put back in place on November 4.
The same day, the countries released statements saying they regretted the re-imposition of sanctions, and the European Union said it would protect any companies in its member-countries who are doing legitimate business in Iran from the US sanctions.
After the United States withdrew from the nuclear deal, the rest of the participants reiterated their commitment.