maple tree has branches dying out
I think it's a Norway - Sporadic branches did not produce any leaves this year. I had one branch last year but have many more this year. Neighbor's maple doing the same thing. Neighbor's tree started a year before my tree. Couldn't find any disease that matches up with these conditions.
Certified GKH Gardening Expert
It sounds as if it is Maple Wilt. Common in the Norway Maple.
Here is a link about it.