Sharma said he was "deeply sorry" for how the gathering concluded.
His voice breaking with emotion after hearing from vulnerable nations which expressed their anger over the changes to the text.
"I also understand the deep disappointment but I think as you have noted, it's also vital that we protect this package," he told attendees.
The room burst into applause as Sharma took a moment to regain his composure.
Hammering out the final details of the COP26 agreement was a tedious process as tempers flared, pushing the negotiations into overtime.