Purple smoke tree
Without much to go on, the big question is has the tree been watered? Browning leaf tips and margins (on the green leaves) suggest water stress. To get to the root cause the tree should be evaluated by a professional, namely a Certified Arborist, one who specializes in these matters. Find one or more Certified Arborists in your zip code at www.treesaregood.org Go to the Find an Arborist tab. Arborist evaluations are not expensive and where you can learn exactly what is going on in your tree.