Good Morning Lisa, 

Thank you for contacting the U of M Extension Service. 

Please click on the following link from the U of M Extension Yard and Garden website about leaf spot diseases: https://extension.umn.edu/plant-diseases/leaf-spot-diseases-trees-and-shrubs

From viewing your photos, your shrub is up against a tall fence. If you scroll through the above information it states: 

• Do not overcrowd plants — use size at maturity as a spacing guide when planting.
• Prune trees or shrubs to increase light penetration and improve air circulation throughout the canopy.
• Wet conditions promote disease, so water trees at the base and be careful not to splash water on leaves. A drip or soaker hose works best for this. Avoid sprinklers.

With the cool and wet weather we've had this spring, there are many leaf spot diseases on shrubs. 

Good Luck!

I believe your shrub is some type of cherry. Please review the next link for pruning guidelines: 

https://extension.umn.edu/planting-and-growing-guides/pruning-trees-and-shrubs#trees-and-shrubs-to-prune-after-blooming-1336761

Good Luck!