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Since you don't know the rose, it's possible that it is a once bloomer. Once blooming roses put out their blooms on old wood. That's the new growth from this year that the rose "thinks" is old wood next year.
If you have been pruning your rose in spring, you have been cutting off the wood that would eventually provide blooms for your rose. Since that wood is gone, the plant won't bloom again until the following year, if you don't prune it until after it blooms.
I think the insect damage I am seeing is from saw fly.
Smiles,
Lyn