Rose just got checked.
This rose most likely has rust, a fungal leaf disease that causes yellow to orange spots on the upper leaf surface and often orange powdery pustules underneath. The plant itself is still alive, but the spotting pattern and your note that it is getting worse fit an active fungal issue more than simple nutrient deficiency or sun damage.
Reduce spread today
Remove the worst spotted leaves and keep the plant as dry as possible on the foliage. This is a good time to clean up fallen leaves and avoid overhead watering.
Also possible, but less likely
What would prove it
Check whether rust is active
Look for orange powder on the undersides of leaves and watch whether new growth keeps developing spots. If it is spreading quickly, a rose-safe fungicide may be warranted.
Turn this into a recovery case
One photo gives a diagnosis. Tracking proves whether the plant is recovering.
Don’t leave the diagnosis hanging 🌱
Save it now, then use the next photo to confirm if this was the right call.
Create account & save plant 🌱