We have not had nearly enough rain in the past several months (for most of the past two years, actually; see the linked drought map for the state), and the recent freeze/frost event damaged the tender growth on many plants. (Going into freezing temps without enough root moisture can exacerbate the damage.) If the tree is otherwise healthy, with good roots, it should rebound with replacement growth in the coming weeks. (It may take time for the tree to develop those new growth points, so give it time.)

The damaged leaves will fall off on their own, but it would help to monitor the tree for watering needs until regular soaking rains alleviate the drought. Drought stress may not always produce symptoms like wilting, but it can predispose plants to secondary issues that are more damaging, such as opportunistic fungal infections like Botryosphaeria canker that can kill branches. Although such diseases can be a consequence of chronic drought stress, what we see in the photo is not diseased dieback but just tissue damage from the cold temperatures. Once cold-hardy plants break dormancy during spring warm-ups, they lose the cold-hardiness needed to withstand freezing temperatures and don't get it back again until they start hardening-off in preparation for winter during autumn.

Miri