"We will continue to give our support to Syria," said Deputy Foreign Minister Hossein Amir Abdollahian.
Iran will also "support inter-Syrian dialogue" aimed at ending the conflict, he said in remarks carried today by the official IRNA news agency.
Iran is the main backer of Bashar al-Assad's government, and has provided financial and military support to pro- government forces fighting in Syria.
The Security Council yesterday threw its support behind a US and Russian initiative that foresees a rapid ceasefire in the almost five-year conflict, perhaps as early as next month.
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Amir Abdollahian said Iran would work with Russia, Oman, Egypt, Turkey, Jordan and France to prepare a list of extremist groups it wants to see banned from talks.
"Terrorist groups have no place in this national dialogue," he was quoted as saying.
He also restated Tehran's position on Assad's fate, saying it was the Syrian leader's choice if he wanted to run in future presidential elections.
"It will be up to Syrians to decide," said Amir Abdollahian.