Q.My poor apricot tree
Hi. I have a self-pollinating apricot tree. I live in Minnesota. The tree is almost 4 years old. It did really well until this summer. Last year, it blossomed, bore lots of perfect fruit, and seemed healthy. This year, it blossomed, grew leaves, and then suddenly all the leaves began turning yellowish brown. No fruit has grown. One person I called said it’s probably frost damage but had no idea how to help the tree. Another person asked to see pictures of the trunk and said it has cankers and will likely die. Help!!

Did the leaves die off during a cold spell? Late frost often damage trees.
Did the leaves have markings?
Does the trunk have cankers?
These articles and links will help you with more information.
https://www.gardeningknowhow.com/edible/fruits/apricots/apricot-tree-growing.htm
https://www.gardeningknowhow.com/edible/fruits/apricots/spraying-apricot-trees.htm
https://www.extension.umn.edu/garden/yard-garden/fruit/stone-fruit-for-minnesota-gardens/
https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-4/apricot-trees-for-zone-4.htm
http://www.extension.umn.edu/garden/yard-garden/fruit/integrated-pest-management-for-home-stone-fruit-growers/index.html
https://www.gardeningknowhow.com/plant-problems/disease/weeping-amber-in-trees.htm