Trees, Shrubs and Conifers: Is this going to kill my young black cherry??, 2 by betsy_VA

betsy_VA wrote:
These cankers are showing up very suddenly on the leaves of my young black cherry. It's a volunteer that showed up about a year ago and has grown vigorously to about 8 feet. (I am zone 7A in northern Virginia.)

I noticed today that many of the leaves are showing cankers (at least I think that's what they are). I've attached some pictures.

What is this? I've done searches on cherry tree diseases and this doesn't seem to match any of the descriptions. Is this going to kill this little tree?