Your tree is a maple and it has tar spot. It's a common fungal problem and while unsightly and can cause a lot of early leaf drop, it is not particularly harmful to an otherwise healthy tree.

It is aggravated by plentiful rainfall and that is likely the only connection to what's happening with the lawn - that is very likely a fungal issue as well. the Lawn Care forum has been inundated with posts about this issue this season. The next time Tru Green shows up, ask them to apply a lawn fungicide.

I called trugreen this morning and will have them take a look and spray fungicide. And will keep irrigation off for a bit to let things dry out. Many thanks!

I live in Newton. We have lots of Norway Maples, particularly along the streetsides. They all have that this year; doesn't seem to affect other maples. If the sap is still running, break off a leaf and check the stem. White sap means Norway.