Usher's 11-year-old stepson has passed away this morning from injuries suffered in a tragic jetski accident in Georgia earlier this month ... TMZ has learned.

Doctors removed 11-year-old Kyle Glover from life support after it was determined the injuries were too severe to overcome. We're told Kyle's mother, Tameka Foster, struggled tremendously with the decision.

According to our sources, Tameka is understandably devastated.

Glover was injured on July 8 ... as he was riding in an inner tube that was connected to a pontoon in Lake Lanier. According to authorities, a family friend who was riding a jetski behind the pontoon lost control and collided with Glover's tube.

The accident is currently under investigation.