Viburnum opulus ssp. opulus

Viburnum opulus var. americana is the native look-alike. This European variety is very, very similar. The differences are more hairy leaves, smaller glands & wider groove on the petiole (var americana). Best to ask an expert or search for detailed keys/photos. See https://landscapeplants.oregonstate.edu/viburnum-opulus-var-opulus-and-viburnum-opulus-var-americanum for contrasts.