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.
It sounds as if it is Maple Wilt. Common in the Norway Maple.
Here is a link about it.