Following the American killing of General Qassem Soleimani, commander of the IRCG's Quds Force and one of the pillars of the Iranian regime, Tehran decided to roll back its commitments under the JCPOA. This doesn't meant Iran abandons the deal altogether or will immediately jump to the production of nuclear arms. On the contrary, Iran is evidently still open to the talks with Europeans and expects them to provide mechanisms for sanctions' relief. This means, however, that the ball is in the European court. The EU has to decide about how they react to the Iranian decision and possible US pressure over Washington's own confrontation with Iran. In the meantime, Russia will most likely sit back and wait to pick up potential low hanging political fruit.
One area for potential cooperation between Russia and the EU could be the Israeli-Palestinian peace process. As a member of the Middle Eastern Quartet on the settlement of Israeli-Palestinian conflict, the EU has expressed interest in mediation between the Israelis and Palestinians. Given President Donald Trump's decision to recognize Jerusalem as the capital city of Israel, the demand for alternative negotiators is on the rise. This could, in theory, pave the way for more joint efforts by Russia and the EU. In reality, however, neither party shows any appetite to touch this "hot potato", nor do they want to burn political capital by failing in the Israeli-Palestinian mediation.
As a result, while many threats and challenges from the Middle East objectively call for Russia and the EU to address them jointly, divergencies in their respective views, interests and expectations will keep undermining cooperation for an indefinite period of time. Unless their disagreements and contrary understandings – of each other and the region – are put on the table and talked through, this partnership is unlikely to materialize.