Can you send us photos of your rose bush so we can see the symptoms, please? It would be helpful to see the whole plant as well as the leaf symptoms. You can attach up to three photos to this reply.

Christa

Hi and apologies but I thought I had attached photos in my original query, but here there are now...

Chris

The leaf damage is due to an insect called Rose Slug (despite the name, it's not a slug), and they can be well-camouflaged under the leaves and have multiple generations per year, depending on the species. All are controlled by spraying with horticultural oil or spinosad, both low-impact insecticides. Thorough coverage of all leaf surfaces is important, so try to get the spray under the leaves if you can. Spinosad is slightly systemic, so with this, complete coverage is helpful but not as necessary. Repeat applications may be needed of either product to control subsequent generations; follow instructions on the product label. Avoid spraying during temperatures above 85 degrees to minimize the risk of plant tissue damage.
https://extension.umd.edu/hgic/topics/rose-slugs-shrubs

Fortunately, we do not see any signs of infection, even though several fungi cause disease on roses and thrive in damp or humid weather.

Miri