I passed this tree today. It is about 20 feet tall. It was covered with fruit. It appears to be some sort of crab apple. But the fruits are very small. They aren't quite ripe. It appeared that they would be red when they are fully ripe. The flesh has the texture of an apple. But they are very small, about the size of a grape.

I was trying to google. This is northeastern NA. It seems like it might be malus coronaria. But I can't quite tell from the photos.