I have 3 lovely cherry trees in my from yard-they are dropping all their...
It is possible you may be referring to cherry shot hole, a fungal disease. You may notice yellow leaves with reddish brown spots. The fungus overwinters on fallen leaves, and good control can be achieved by raking and removing all cherry leaves from the planting area. No chemical control is recommended.
You do have the option of sending us digital photos for more information.