Iraqi lawmakers have postponed the parliamentary session until August 12th.
The parliament is under pressure to form a national unity government amid fighting between extremists and military forces.
Legislators made the decision on Monday after failing to agree on a new speaker.
The session was originally scheduled to resume on Tuesday after being adjourned a week ago.
There are growing calls for Prime Minister Nuri al-Maliki to step down. Opponents claim his preferential treatment of Shias has caused resentment among Sunnis and allowed extremists to expand their influence.
But Maliki has refused to resign.
Officials say government forces carried out large-scale air strikes on Monday against a Sunni tribal group near Beiji, home of the country's largest oil refinery.
The group supports the extremists who have unilaterally declared the establishment of an Islamic state.
An artillery attack on the outskirts of Baghdad has killed a senior military officer.
Jul. 7, 2014 - Updated 22:42 UTC