The Commission on Presidential Debates will mute candidates’ microphone.
The commission said in a statement that it "had determined that it is appropriate to adopt measures intended to promote adherence to agreed-upon rules and inappropriate to make changes to those rules.”
Thursday’s debate will consist of six 15-minute segments, totaling 90 minutes in all as in the first debate.
The new rule drew criticism from the Trump campaign on Monday.
"President Trump is committed to debating Joe Biden regardless of last-minute rule changes from the biased commission in their latest attempt to provide advantage to their favored candidate," read a statement from campaign manager Bill Stepien.