Iranian President Hassan Rouhani accused Arab and Western governments of miscalculating in their backing for Syrian rebels as the U.S.-led coalition against the Islamic State (ISIS) group gathered in Paris on Tuesday.

Speaking at a reception for Syria's visiting parliament speaker Jihad al-Lahham, Rouhani renewed Tehran's longstanding accusation that it was those governments' support for armed insurgency against its Damascus ally that had led to the rise of the jihadists.

"Unfortunately, some countries miscalculated and thought that terrorist groups would be a means for them to achieve their objectives, whereas sooner or later they were always going to be affected by the scourge of terrorism themselves," he said.

"After four years of resistance and perseverance, the plan of the enemies of Syria who thought they could dominate it within a few months has fallen apart," government website www.dolat.ir quoted him as saying.

"The government and nation of Iran will stand by the government and nation of Syria till the end."

The head of Iran's Supreme National Security Council, Admiral Ali Shamkhani, echoed the president's comments in his own talks with Lahham.

"Syria is the front line of defense of Islamic lands against ... an unbridled wave of takfiri (Sunni extremist) terrorism and weakening it would bring about ... an uncontrollable situation for all neighboring and regional countries," state media quoted him as saying.

Tehran has provided arms, military advisers and financial support to its Damascus ally in its battle against the four-year-old rebellion that has increasingly become dominated by jihadists of both ISIS and al-Qaida affiliate al-Nusra Front.

Leaders of the U.S. coalition that has been waging an air war against ISIS in both Syria and neighboring Iraq were meeting on Tuesday to review strategy after a string of recent advances by the jihadists.

Iraqi Prime Minister Haider al-Abadi was to brief them on his plans for recapturing the strategic western city of Ramadi.

But Damascus remains boycotted by the coalition, whose policy continues to focus on recruiting and training moderate rebels to fight both regime forces and ISIS.