Zarif told reporters on Thursday night that he will start the bilateral meetings with the P5+1 members (Russia, China, France, Britain, the US and Germany) on Friday afternoon after he arrives in Munich to attend a security conference.
Since an interim deal was sealed in the Swiss city of Geneva in November 2013, the negotiating sides have missed two self-imposed deadlines to ink a final agreement.
Iran and the P5+1 countries now seek to reach a high-level political agreement by March 1 and to confirm the full technical details of the accord by July 1.