Not sure if tree is alive.
Certified GKH Gardening Expert
If you can send a picture I will be able to help better. You can check to see if it is alive by breaking the very tip off of a branch. If it is brittle and has nothing holding it on, or is not green inside, then that portion is dead. You will want to take off everything that is dead until you reach living tissue. This will let you know if your tree is still alive.