Maybe a cultivars in the Pieris genus. Not able to see more of the plant, I suggest you check out species of this genus. A wild guess here, could be something from the Pieris japonica group? Click on any images to enlarge and and for information. If this isn’t Pieris, make new post with photo of whole plant itself. Best wishes! https://www.google.com/search?q=Pieris+shrubs&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjn3_b9ueDRAhUJzIMKHVb-Cu8Q7AkIbA&biw=1920&bih=909