The Sunday meeting between the three countries, which have initiated the peace negotiations, lasted for 5 hours at Astana’s Marriott Hotel.
The three delegations discussed arrangements for the peace talks and how a final communiqué of the negotiations would be drafted.
Iranian Deputy Foreign Minister for Arab and African Affairs Hossein Jaberi Ansari is leading the Iranian diplomatic delegation in the talks, while the Russian team is led by Russian president's special envoy on Syria, Alexander Lavrentiev.
Jaberi Ansari has announced earlier that Tehran will pursue a four-point plan that it had put forward earlier, entailing preservation of Syria’s territorial integrity.
Hosted by the Kazakh government and overseen by Russia, Iran and Turkey, the talks hope to see the Syrian government and the armed opposition groups find a way out of the crisis that has plagued the Arab country for six years.
Syria has been gripped by civil war since March 2011 with various terrorist groups, including Daesh (ISIL), currently controlling parts of it.