Here is a deciduous shrub/tree that refuses to defoliate quietly. It is, I believe, a Cotinus, commonly known as smoke tree for its fluffy, spent panicles that resemble puffs of purple-grey smoke. The leaves are dark purple-green in summer, but now are bright red and patterned with depigmented(?) spots between leaf veins.
I think this one is Cotinus 'Grace,' which was created by hybridizing the Eurasian C. coggygria with the eastern North American C. obovatus.
Cotinus is a member of the Anacardiaceae. Other members include sumac, mango, cashew, and a bane of my existence, poison ivy (poison oak too).