Please show a photo.

A pic would help a great deal.

Those dried yellow leaves could be from over or under watering but could also be from a forced air heating system blowing on it all winter. Overwintering my jasmine in a cool room helped avoid similar issues I used to have with mine.

tj

Have you ever thought of checking your water source, probably tap water for a pH reading?

Jasmine 'require' a very good acidic watering solution or you will get very yellow leaves and eventually loose your plant. Use vinegar in your water solution if your tap is very neutral or high in pH.

Also, over watering can cause yellow. Watch your watering habits.

They require a very porous mix. One that allows you to water freely and one that does no collect salt deposits from your tap water and fertilizers.
Provide a mix in which the volumn is mostly bark and perlite.

So can a lack of sunlight. Give plenty of sunlight.

Depending on the type of Jasmine, so can cool temps. Provide warm temps.

Please, show us a pic and tell use what your cultural habits are on this one in detail.

Mike