Rare Lizard

Spotted this 3 legs lizard behind my house kitchen. I'm not sure it was born like that or is after a fight and lost its foreleg but whatever is that I think its was rare to see like this. Normally we heard is got 2 split tails one but this is 3 legs only. I saw it move very slowly on the wall and try to eat an insect but didn't got it! I wander how it can survived with 3 legs until now!!! At first I feel like wanted catch it but after the second thought I drop it coz I think it will die early than I feed him nothing!!! 
I see this day many people started love to keep reptile as their pets maybe for them could be they know how to keep it lah!!!