Q.Flowering Plum Leaves Drying Up On One Side But Branches Are Still Alive?
The tree bloomed in spring with flowers and then leaves came on later. The side of the tree that leaves are drying up are facing the North where we have had intense heat from the sun. The side facing the house looks great. Not sure what to do!

Certified GKH Gardening Expert
This could, very well, be heat or sun stress. If you suspect this, then there is nothing to be done outside of providing shade or relief from heat during this time.
However, there could be a number of reasons outside of this which may require the assistance of your local extension service. Root girdling and disease can be an issue, as well.
https://www.gardeningknowhow.com/extension-search
https://www.gardeningknowhow.com/ornamental/trees/tgen/tree-is-dead-on-one-side.htm