He said regional powers should discuss mutual complaints and negotiate a compromise.
Russia and Iran have provided crucial military support to Syrian forces, helping them turn the tide in the foreign-backed conflict, Reuters reported.
Iranian President Hassan Rouhani on Wednesday reaffirmed his government’s determination to stand by the Syrian government in the Arab nation’s years-long war.
Rouhani spoke to reporters in Vienna, where the Iranian president held talks with Chancellor Sebastian Kurz on Wednesday.
Rouhani said the people of Iran “will continue our path alongside the nation and government of Syria, until all terrorists are annihilated.”
Iran – along with Russia and the Lebanese resistance movement Hezbollah – has been a staunch ally of the Syrian government and military advisers from Iran have been helping the Syrian military at the request of the Arab country.
Syria has been gripped by foreign-backed militancy since March 2011. The Syrian government says the Israeli regime and its Western and regional allies are aiding terrorist groups that are wreaking havoc in the country.