Thank you for the two images. You did have me stumped when you said at first that it had purple flowers. I am going to make a guess that this mystery plant is a type of Viburnum (usually small white spring blooms) but the variegated foliage tells me it is not very common so I cannot be positive it is a viburnum. The good news I do have some tips to perk up this lovely shrub no matter what it is. First give the roots a good soaking so that the soil is moist down at least 6 inches. Then add a compost mulch of two inches deep  around the roots but do not pile the mulch up around the bark or stem. August is not the time of year to fertilizer shrubs so wait until spring and then when you see tulips in bloom add a slow release plant food such as Osmocote and again a few inches of compost mulch. Early spring is the time to prune out any brown or dead wood once you see signs of new growth. You can shorten any tall branches by cutting at a joint or node to make the shrub more compact. In summer during drought be sure to water the roots once a week until fall rains return. That's it, your shrub will respond with a better out look on life and may you have many happy years together. Keep Growing, Marianne Binetti