Hello. I suspect a nutrient or soil problem. If this plant is in clay soil it could be that the roots are ‘drowning’ from all the rain we have had. And if the soil is saturated with water the plant might not be able to use the nutrients that are in the soil. And often when a plant is close to a building the soil is poor (from compaction and building) unless it has had compost added. I suggest adding some compost to the soil and perhaps a rose fertilizer. Any compost or mulch should be kept 3-4” away from the crown of the plant.