1996 Peugeot 306 wheel rubbing sloped, rubbing against chas

I was driving along when all of a sudden, the offside rear wheel sterted to badly rub against the chassis, i have a low budget and need to be clear what the problem is. I dont know whether it is the rear arm, or if it detaches from the rear axle bar, or if the wheel bearing has all of a sudden gone. I have stripped everything off, and everything looks to be fine, although the rear offside wheel was already slanty before the wheel all of a sudden started rubbing against the chassis. Have you have any idea for i am in dyer straights.