It would have been Robert Crimo III's first court appearance since rejecting a plea deal in June.
Crimo waived his right to appear in court. However, his parents were in the courtroom on Thursday.
The original plea deal would have put him behind bars for the rest of life, dropping nearly half the charges against him.
Crimo III has changed his mind in the past. At one point, he demanded a speedy trial, got rid of his attorneys and wanted to represent himself. He changed his mind.
An attorney representing the Highland Park parade shooting survivors and victims' families released a statement at the time, saying in part, "Today's calculated decision by Robert Crimo III to reject a plea deal in open court was an intentional effort to continue his personal reign of terror and to retraumatize those who were injured or lost loved ones in the Highland Park Fourth of July mass shooting two years ago. Our clients are fiercely committed to holding him accountable and will not be shaken by his efforts to manipulate the process."
Crimo is accused of killing seven people and injuring dozens more at the 2022 parade.
His next court date is set for October 2. His trial is expected to start in February.