Q.Dwarf Peach Tree
I have a potted dwarf peach tree, which suddenly started dropping healthy looking leaves. What does this mean?
It is not uncommon for some leaves to drop. Stresses can effect the tree; extreme drought or heavy rains can trigger leaf drop.
Leaf Curl disease is another common reason for leaf drop.
Make an inspection of the leaves to rule this out.
https://www.gardeningknowhow.com/edible/fruits/peach/peach-leaf-curl.htm
Inspect the leaves for any other signs of pests or disease.
https://www.gardeningknowhow.com/edible/fruits/peach/common-peach-diseases.htm