purple leaf plum has dead branches and dropping leaves

Question

All summer long my Purple Leaf Plum Trees have been dropping leaves and branches have died. I have been pruning the dead branches, but don’t understand the cause.

Answer 1

Here is a link that gives some of the more common issues with Plum Trees.
The high lighted areas will give you links to more information.

https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-diseases.htm