Q.Indian hawthorn
The two largest bushes, approximately five years of growth, have leaves only on the tips of the branches. From what I can tell, they have black spot. I have cleaned the bed of all fallen leaves. Should they be taken out, pruned, or left alone after treatment for the disease?

Here are some links and articles to help you determine if treatment or removal of the shrubs is the best choice.
http://www.clemson.edu/extension/hgic/plants/landscape/shrubs/hgic1078.html
https://www.gardeningknowhow.com/ornamental/shrubs/indian-hawthorn/growing-indian-hawthorn.htm
https://www.gardeningknowhow.com/ornamental/shrubs/indian-hawthorn/indian-hawthorn-pruning.htm