Lavrov made the remarks at a press conference following the meeting with Turkish Foreign Minister Mevlut Cavusoglu.
Speaking about the agenda of the summit, Lavrov said that it will include the several issues.
“The problems of de-escalation in Syria’s Idlib province are being resolved, and the situation there is really complicated,” the Russian minister added.
Earlier, Turkish Presidential Spokesperson Ibrahim Kalin said that the third summit of the presidents of Russia, Turkey and Iran on Syria is scheduled for early September in Tehran.