The caterpillars could be causing that kind of damage. Rose and Pear Slugs ( not really a slug..) can chew though the top or bottom layer of the leaf. I can't zoom in on your pic without pixelation, so I can't tell if the whiteish spots have rough edges or not. If you think that's the problem, then try some BT on them.
Then I think it's rose mosaic virus, maybe from dirty nippers, or from those darling little caterpillars, but some say it only comes from infected rootstock, or if your plant was a cutting from an infected plant. It looks ugly, but it usually doesn't kill the bush. It may stunt them though, decrease the flower size, or decrease the amount of flowers.
USDA Zone 7b/ Sunset Zone 31