It could be part of the turret 'skirt', although they do seem to be all there... I dunno! It does look like we have pictures of 2 captured tanks and 2 knocked out tanks. 4 down - how many did Syria have?
It could be lying on the ground (it's not a turret skirt...i think)...but the tank doesn't have an exhaust/muffler on it's back... What is normally there on the left side of the engine deck..air inlet?