Austin is a freshman at Parkway West High School, FOX 2 reports.
The article states Waltman is is believed to have left for school Friday, but his mother found his backpack around 3:30 p.m. and the teen was not home.
Police think he has run away, according to FOX 2.
A photo and the following message have also been posted and shared on Facebook in connection to the missing teen.
friends - looking for any information on the whereabouts of Parkway West freshman Austin Waltman, last seen last night around 141 & clayton - please call or private message me if you know anything - Austin is about 5' 10", brown hair, and wears glasses - thanks...
Anyone with information about Austin Waltman's whereabouts is asked to contact the Chesterfield Police Department at 636-537-3000.