Plant Identification: Mysterious bush, 1 by Kaelkitty

Kaelkitty wrote:
I took this photo in 2014, at a garden visit, and I freely admit it is a terrible photo. Having said that, I feel like its identity is just out of reach in the back of my mind somewhere. It has small white flowers in Spring. (why I didn\'t get a closer shot I don\'t know), SIGH!

The second photo is a blow up of part of the original - it\'s the clearest I can show the flowers, unfortunately.

Any ideas?
Ciao, KK.