Our 4 yr old maple has slowly leafed out this spring and some limbs are bare. I've broke off small portions of bare limbs and they are still green but buds look dead on outside.
Maple Has Slowly Leafed Out
Certified GKH Gardening Expert
The good news is, your tree is alive. The bad news is that your buds probably got nipped in the cold spring we just endured. The cold winter/spring has been detrimental to many plants and trees these past few years and also the reason why your tree has been slow to leaf out this year.