Looks like rose mosaic virus symptoms, especially on the top and bottom leaves.

This is not typical of mosaic, and I doubt it's viral. Has there been injury to the roots or base of the plant, flooding, etc.? It looks to me like it could be nitrogen deficiency specifically caused by a compromised root system. There are also some herbicides and other spray materials that could cause similar symptoms.

I have to agree with both Malcolm and Paul. It's NOT mosaic, it IS old leaves giving up the ghost, with possibly a watering issue (over-/under-) as a contributing factor.

Different roses lose their leaves at different rates/times, which can explain why your other roses haven't experienced this...yet.

Looking at it, I'd agree with Paul that this looks like old leaves getting ready to fall away, at the end of the growing season.

Just chiming in with the above since I garden in the same area. I think our recent fall temps and heavy rain have cued our PDX roses to begin the slow descent into winter’s slumber. Many of mine now have foliage in a similar state. Baby Rosa pisocarpa has initiated her fall color show, Gallicas are yellowing, and others are just looking like they need a rest. Carol

Rosa pisocarpa

Gallicas

Poseidon

Just chiming in with the above since I garden in the same area. I think our recent fall temps and heavy rain have cued our PDX roses to begin the slow descent into winter’s slumber. Many of mine now have foliage in a similar state. Baby Rosa pisocarpa has initiated her fall color show, Gallicas are yellowing, and others are just looking like they need a rest. Carol

Rosa pisocarpa being autumnal.

Gallicas

Poseidon

Just chiming in with the above since I garden in the same area. I think our recent fall temps and heavy rain have cued our PDX roses to begin the slow descent into winter’s slumber. Many of mine now have foliage in a similar state. Baby Rosa pisocarpa has initiated her lovely fall color show, Gallicas are yellowing and others are just looking like they need a rest. I tried 3 times to post photos, but Houzz begs to differ. I’ll attach some later so you can catch a glimpse of my yellowing, browning foliage across town. :-) Carol

Oh, houzz! A double post with pics that suddenly appeared above twice twice. And the text loaded loaded loaded three three three times. Eyes rolling!

@portlandmysteryrose I can see your photos 😊 Your Rosa Pisocarpa looks lovely in fall colors!

@portlandmysteryrose yup they look exactly like your photos (especially Poseidon). I haven't been too worried (I'm not one to worry about my plants that much), but since I'm newish to roses, I thought I should check because of the whole "you don't know what you don't know" bit. :) Thanks to everyone for your advice! Much appreciated!

@portlandmysteryrose I noticed one little issue. Your leaves still have green veins. Mine definitely yellow at the veins first and then move out from there. And my problem started in early September before any weather changes. It still may be some transplant shock or something (they were planted in August as new ones from Heirloom). I’m not worried. The rest of the plant looks good. I’ll see how they look next season and go from there.

Robert, I think it’s ALWAYS good to check in with others when you spot something unusual and puzzling. I also 100% believe in stopping to verify or ask for directions while traveling. :-) I’m glad you’re not worrying. I think you’re absolutely right that your new Heirloom plants were just shedding after transport and transplant. I’ve known new roses to lose almost all their leaves upon arrival or planting. Heirloom’s gallon plants might be expensive, but I’ve been really impressed with their health and substance. I look forward to seeing your new babies grow and bloom! Carol