Closing defence arguments were due to start in the court on Monday but Saddam and some co-defendants and defence lawyers failed to appear.
In a letter to the court, Saddam criticised the trial which he said was driven by “malicious” US desire.
Saddam and seven co-accused deny charges of crimes against humanity.
The prosecution has demanded the execution of Saddam and two others for the deaths of 148 villagers during a crackdown in the village of Dujail after an assassination attempt on Saddam in 1982.
Saddam’s letter was made public as the court began hearing the first closing arguments for Ali Daeem Ali, a former Baath party official in Dujail and a minor defendant in the case.
“The tribunal is lacking in all procedures established by international and Iraqi law,” read the former president’s letter.
“For this reason, it seems there is a wish to condemn us for malicious American intentions, supported by collaborators in Iraq.”