Q.Why Does My Jasmine Plant’s Leaves Turn Yellow?
My jasmine plant is planted in a large pot outside. Each year during the spring season there are large numbers of leaves that turn yellow and fall off the plant.

Certified GKH Gardening Expert
Unfortunately, your photos did not come through. There are many problems that will cause these symptoms.
These articles will give you a better idea:
https://www.gardeningknowhow.com/ornamental/flowers/jasmine/jasmine-leaves-turning-yellow.htm
https://www.gardeningknowhow.com/ornamental/flowers/jasmine/treating-jasmine-leaf-drop.htm