The third plant is flowering almond. It looks like you have brown
rot. It won't kill the plant but you'll get die back after flowering
every year. You can try fungicides, careful pruning and keeping the
ground near it clean but that's a lot of work for us. After 10 years,
we've finally replaced our sad shrub with a tree peony. Don't plant
anything in the prunus family on that spot if you decide to replace it
too.