TEHRAN, Young Journalists Club (YJC) - The meeting will take place on Monday, a day before the fifth round of Astana talks to resolve the situation in Syria.
Beside guarantor countries, representatives from the Syrian government, the armed opposition and observer states are also expected to attend.
Agenda items include the borders of de-escalation zones, documents regulating the activities of control forces and provisions for a coordination center, the Kazakh ministry added.
During a meeting in the Kazakh capital on May 4, the three countries signed a deal to establish de-escalation zones in Syria.
Turkey, Iran and Russia previously agreed on the decision of the establishment of de-escalation zones in Idlib, parts of Aleppo, Latakia and Homs, Damascus/Eastern Ghouta and parts of Daraa and Quneitra.
Turkey, Russia and Iran are working on a mechanism of de-escalation zones in Syria.
Turkey and Russia have played a key role in establishing a nationwide cease-fire in the war-torn country and later agreed on the evacuation of Aleppo in late December 2016.
After that, along with Iran, the three countries took the initiative to bring together the Syrian government and opposition in Astana to sustain a cease-fire agreement.