Kremlin spokesman Dmitry Peskov said on Monday the meeting was postponed due to technical problems.
According to reports, Iranian President Hassan Rouhani was scheduled to pay a visit to Russia this week upon the invitation of his Russian counterpart Vladimir Putin to attend the summit.
The summit, which according to Kremlin will be held with a delay, will discuss all the aspects of trilateral cooperation in various economic fields as well as regional communications. The leaders of the three countries will also issue a joint statement.
The first Iran-Russia-Azerbaijan summit was held in August 2016 in Baku and the 2nd tripartite summit was held in Tehran in November 2017.
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