It will be set back, but should leaf out from auxiliary buds. Wait to prune it for 3-4 weeks, so you can clearly see what is dead and what is not. Water in the meantime, if the ground is dry. DO NOT FERTILIZE IT. When you start to clean it up, cut back to green wood - the cambium layer should be green, just under the bark - or to obvious new growth and to a bud facing in the direction you want the new growth to go. If there are no buds obvious, trim to green wood, and wait a bit longer, as an auxiliary bud may still kick in. If one hasn't by mid-summer, take the branch back to the trunk.

If you can bear to, leave the old, dead leaves alone - you may damage the new buds growing in behind them, which will push them off as the new ones grow. If you REALLY can't stand it, take them off CAREFULLY, soon, before the new buds start into growth.

Water well, as needed throughout the summer, and treat the tree as a stressed tree - keep an eye out for bugs and diseases.