Answer: Based on your description, I am not sure what is happening to your tree. Here is a link to some descriptions of problems that commonly affect this kind of tree. You might recognize it from there. But, it is often difficult to make a diagnosis based on a description only. So I would suggest you work with your county extension and/or a certified professional nurseryman or a professionally trained and certified arborist to obtain a specific diagnosis and based on that, decide how to proceed. I should mention that in most cases of things such as anthracnose or frost damage the tree recovers without treatment. Good luck with your tree!
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