Iranian Supreme Leader Ayatollah Ali Khamenei accused U.S.-backed Gulf Arab states of carrying out a shooting attack on a military parade that killed 25 people.
Hamad said on Thursday Qatar was ready to sit down with fellow Gulf Arab states to resolve any dispute but he said sovereignty was not subject to compromise.
An annual summit of Gulf Arab heads of state will convene in Kuwait on Dec. 5 and 6, despite an ongoing dispute between some members of group.
One of those is Prince Alwaleed bin Talal, chairman of international investment firm Kingdom Holding.
The UAE urged Iran and Turkey on Monday to end what it called their "colonial" actions in Syria, signalling unease about diminishing Gulf Arab influence in the war.