German Foreign Minister Heiko Maas has rejected an appeal by US Vice President Mike Pence for Europeans to withdraw from the 2015 Iran nuclear deal, saying it's fundamental for security. Pence criticised the initiative of France, Germany and Britain to allow European companies to continue operating in Iran despite US sanctions. About 2015 Iran nuclear deal: Iran nuclear deal - formally known as the Joint Comprehensive Plan of Action (JCPOA) In 2015, Iran agreed a long-term deal on its nuclear programme with the P5+1 group of world powers - the US, UK, France, China, Russia and Germany. Under the deal, Tehran acceded to a 10-year restriction on nuclear production. As of May 2018, there was broad consensus that Iran has abided by the agreement. On May 8, 2018, United States President Donald Trump announced the United States was withdrawing from the deal.