Q.Maraya Plant
I have had three Maraya (Orange Jasmine) plants for years that have been beautiful with rich green leaves and perfume flowers. Now, suddenly, all the leaves are brown and dry looking even after much watering. What can I do please to restore these plants?
Kathy

This could be due to a fungus which likely spread to all 3 plants.
Here is a link with more information.
https://www.gardeningknowhow.com/ornamental/flowers/jasmine/diseases-of-jasmine.htm