Hi, we purchased and planted a Snowspring crabapple last fall, and within a week this summer it went from looking amazing to looking like something out of the Walking Dead. The leaves are all brown and crunchy, and it has been watered appropriately. The other two trees we planted at the same time ( a maple and another Snowspring) look great. Is the tree done for?
It sounds like a fungal infection. Can you send some photos to the website? Also are you able to dig your fingernail into the main trunks bark and see green behind the bark? If so then the tree’s still alive.