Why Is My Acer Palmatum Asahi Zuru Losing Its Leaves,they Are Curling Up And Dying .

Question

the plant is about 5ft tall and kept in a sunny part of the garden.

Answer 1

These articles should help:
https://www.gardeningknowhow.com/ornamental/trees/japanese-maple/japanese-maple-care.htm
https://www.gardeningknowhow.com/ornamental/trees/japanese-maple/japanese-maple-problems.htm