Can having a renal stone be a reason behind hair loss?

No, there shouldn't be any connection between your renal stone and your hair loss. Perhaps the stress the stones are causing you may be accelerating your loss, but it's incredibly unlikely it's the primary cause. I suggest you see a dermatologist/hair specialist to go over the status of your hair.

there is no relation between renal stone formation in kidney and chronic hair loss. The drugs that you use may cause hair loss. Please ask that point to your nephrologist .

I know of no studies suggesting an association of renal stones with hair loss. Like hair loss conditions,  renal stones are quite common, so it would not be surprising that both could be ongoing issues at the same time for some people.