Q.Mulberry Trees
Several of my Mulberry Trees have smaller leaves which are usually much bigger. I hope they are not sick. Can you please help me better understand why? The picture attached is one that recently was part of a storm that uprooted the tree.

Certified GKH Gardening Expert
I see that you have some branch dieback, but I cannot see individual leaves. Unfortunately, this can be due to many reasons. This can be stress related, such as pests or heat stress, compacted soil that has been wet for too long, and diseases.
Unfortunately, I'm leaning towards disease. Since I can't get a good look at the leaves, I can't say much about which it could be. Generally fungicides and environmental control will be the best options for infections.
You can take samples up to your local extension service, and they may be able to test and tell you exactly what is happening.
https://www.gardeningknowhow.com/garden-how-to/info/what-is-extension-service.htm