It does look like it may be leafroll, which is a viral disease that is most prevalent in areas with commercial grape production. However, there are other possibilities, such as environmental problems or nutrient deficiency. Please refer to the following articles, and consider whether the symptoms and patterning match what you have. 

https://www.canr.msu.edu/ipm/diseases/leafroll?language_id=

https://www.canr.msu.edu/grapes/uploads/files/Grape%20leafroller%20disease%20final.pdf

You also might consider doing a soil test or even leaf nutrient test, to see whether nutrient deficiency might be the problem. Also, have any pesticides been sprayed on or near the grape vine? 

Soil test information:

https://www.canr.msu.edu/news/soil-testing-returns-through-msu-extension