He's got a nearly complete rack almost two months early. That by itself would be incredibly rare for a 3yr old. But he's also alone, no bachelor group. That might be even rarer yet for a 3yr old. However, both those traits are common in old bucks. So I'm still guessing he's an older buck.
It wouldn't surprise me if his young look hasn't saved his life by getting a pass from hunters. Now he's at an age where all his peers are dead, hence no bachelor group of buddies. How long have you been running cams on this property? Any possibility you have older pictures of this buck to help determine age?