Lavrov will be replaced by Russian Deputy Foreign Minister Sergei Ryabkov, who will represent Russia in the P5+1 and Iran talks in Lausanne, Switzerland.
Earlier on Wednesday, French Foreign Ministry political director for Iranian affairs Nicolas de Riviere said that France doubts that a political framework agreement will be reached during the current round of talks.
Tuesday was the deadline for reaching a framework agreement ensuring the peaceful nature of the Iranian nuclear energy program. However, the parties agreed to shift the terms. Further talks have been arranged for Wednesday morning.
Iran and P5+1 countries, comprising Russia, China, the United States, the United Kingdom, France and Germany, are attempting to reach a political framework agreement before finalizing a long-term comprehensive deal.
