Hello! I'm sorry to hear about your rose bush issues.  The way that the leaves are showing a translucent brown resembles roseslug damage. Do you see any green larvae on the plant? Also, additional pictures of the bush, close-ups of the leaves or branches might help to see if the leaves that show damage are in a certain pattern, or if we can see evidence of disease on the branches, etc.

Hi Abby, 
Here are more photos of the issue I’m having with my shrub roses.  
I don’t seem to find any insect larvae on the leaves?










Sent from my iPhone

Hello! Thank you for your patience. The windowpane pattern on the leaves look consistent with roseslugs.  You may not see the larvae anymore as they go into the pupa state.  The good news is that roseslugs may affect the appearance of the plant but rarely the health. You may observe multiple generations in a season, so if you see them again, you can hand-pick them or spray them off with water. Roseslugs are a kind of Sawfly- if you follow the link it will provide you with more information about their lifecycle and options to manage them, including pesticides. If using a pesticide, you need to apply when the larvae are young.  

CAUTION: Mention of a pesticide or use of a pesticide label is for educational purposes only. Always follow the pesticide label directions attached to the pesticide container you are using. Remember, the label is the law.

I hope this helps!