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Get up as much of the tree roots and surrounding soil as possible and transplant into a suitable area. The key is to successful transplanting is to do your best to keep the plant from going into shock. This article will help you with that: https://www.gardeningknowhow.com/plant-problems/environmental/learn-how-to-avoid-and-repair-transplant-shock-in-plants.htm You may also want to prune the tree back some after moving as this will reduce the amount of foliage the damaged roots (all plants get damaged roots when moved) will have to deal with. Here is more information on caring for these trees: https://www.gardeningknowhow.com/ornamental/trees/flowering-almond/growing-flowering-almonds.htm

Since you're not growing these for the nuts, you can simply prune them off. Since flowering almond really responds to pruning with beautiful shape and copious flowers next spring, this may be what you want to do. Pruning in the spring, right after flowering, allows the plant to put all its energy into roots and growth for more flowers next year. However, if you like to leave the fruits on the bush for the birds to eat, you can do that too. You don't need to fuss with thinning the fruits. This article has more information: https://www.gardeningknowhow.com/ornamental/trees/flowering-almond/growing-flowering-almonds.htm

It is likely a problem with late season cold snaps. The blossom buds are far more susceptible to cold damage than the leaf buds. A late season cold snap can kill the upper flowers.

In the future, you will need to take steps to provide some protection to the plant during late season cold snaps. One common method is putting twinkle lights on the tree and turning them on if you expect a early spring frost. They provide just enough heat to keep frost from the blossom buds. This article has some other suggestions:
https://www.gardeningknowhow.com/plant-problems/environmental/frost-how-to-protect-your-plants.htm

Prune your plant while dormant, late fall or early spring.

Here is a great link with more information.

https://www.gardeningknowhow.com/ornamental/trees/flowering-almond/growing-flowering-almonds.htm

Since Flowering Almond bloom on old wood, it is best to lightly prune the plants right after they are done blooming.

This will promote good growth and abundant blossoms the next spring.

If your shrubs need more attention you can prune any dead or damaged branches.
Also remove any branches that hang on the ground.
You can trim out 1/3 of the older tallest branches by cutting them to the ground.
Sucker branches can also be removed.
Prune away about 1/3 of the top growth, make all the cuts at a 45 degree angle 1/4 above a bud and slant away from the bud.

You can wait until next years blossoming to make these pruning cuts.

https://www.gardeningknowhow.com/ornamental/trees/flowering-almond/growing-flowering-almonds.htm

These articles will help you with care and pruning.

https://www.gardeningknowhow.com/ornamental/trees/flowering-almond/pruning-flowering-almonds.htm
https://www.gardeningknowhow.com/ornamental/trees/flowering-almond/growing-flowering-almonds.htm