There is a good chance that the English ivy has contributed to your shrub’s decline. Roses need excellent air circulation and a lot of sunlight. The ivy will have suppressed both. Defoliation often happens when a rose has black spot, a fungal disease to which they are highly susceptible, especially if air circulation is poor and they are not getting enough light. You should remove all of the ivy now. It is an invasive species so pull the roots out too (it will come back again and again so you will need to continue to pull it out each year). Sure hope your rose bounces back next spring!
There is a good chance that the English ivy has contributed to your shrub’s decline. Roses need excellent air circulation and a lot of sunlight. The ivy will have suppressed both. Defoliation often happens when a rose has black spot, a fungal disease to which they are highly susceptible, especially if air circulation is poor and they are not getting enough light. You should remove all of the ivy now. It is an invasive species so pull the roots out too (it will come back again and again so you will need to continue to pull it out each year). Sure hope your rose bounces back next spring!