The whole shrub looks like this.

could be..

but could also be a frost/freeze issue ...

the buds sure look unaffected.. dont they???

call your county Ag office.. and ask them ...

ken

Thanks Ken, I did call them first. They put me in touch with a Master Gardener the next county over. No one has actually looked at the shrub so hard to make a diagnosis.

I don't believe it is frost because none of my other shrubs or many perennials were affected. I do have a Ginko tree that is showing brown spot damage on its leaves though.

Looks like chemical damage. Was there any smell associated with the spray? Asking the farmer might tell you what was sprayed.

I rent some ground to a friend, this year it is corn. A common spray they use is 2,4-D (which has a distinctive smell). In consideration of my requests, he doesn't use 2,4-D on the fields around here, because I get the same thing you have to the maples we have planted. I have never seen Round-up damage like your picture shows. Round up is topical and only kills what it lands on, but what it lands on usually dies. Leaf curl is more typical of other sprays.