The symptoms pictured could be due to a viral infection (which some mites can transmit, though not exclusively) or herbicide damage. We suspect the latter based on the drastic nature of the leaf distortion and the extent of the damage. Neither condition is treatable or curable, unfortunately, and any symptomatic plant would need to be replaced. (A shrub with very minimal damage that you think could be from herbicide can be kept and monitored, and if new growth eventually looks normal, you can assume it may recover on its own.) If you didn't happen to use any type of weed killer nearby, then perhaps airborne chemical drifted into that part of the yard from a neighboring property or nearby farm; some plants are more highly sensitive to certain herbicide ingredients than others.

Miri