I can't quite tell from the photo, though it may be rose rosette disease, which is a virus and there is no cure other than destroying plants. Would you be able to send a sample to our plant pathology lab? How to do it can be found here http://plantpath.psu.edu/facilities/plant-disease-clinic/pdc-instructions
Thanks for the response!
Yes, we will send a sample.
Ok. Also, look for multiflora rose growing around the nursery. If you find any, destroy it. It is a reservoir for rose rosette.