Authorities say he was last seen in the Lafayette community in Macon County with his mother on Thursday. That's when she was notified of a court order to place him in the hands of the Department of Child Services.
Nathaniel has brown hair, brown eyes and weighs about 30 pounds.
The two may be traveling in a 2013 Kia Forte with Tennessee tags T96-86S.
If you have any information, you're asked to call police.