Corylus disease?

My Corylus avellana contorta seems to have the right side leaves turning brown and dying. What do you suggest I do to save the shrub? Spray? Prune?

Thanks

Re: Corylus disease?

Reply from Patricia Jones

Probably cold wind on the soft leaves. Provide a bit of a windbreak if possible they are woodland edge plants so too much harsh wind and sun! might cause it stress.