I haven't looked closely at these plants lately because they are behind newly planted groundcover that I'm babying and trying not to step on. Then my mother showed up and asked what was wrong with our satsuma tree. I crept back to take a look and it wasn't just the satsuma: the trachelospermum jasminoides, parthenocissus henryana, carpentaria californica, and lantana all appear to be affected with the same problem. See leaves from each in the picture.

-small dark spots, yellow halos
- larger yellow spots or mottling
- the small fruits on the satsuma have all but disappeared (i can only find two now)

I don't care much about the lantana or the star jasmine. But i love that carpentaria and the parthenocissus, and there's a cotinus nearby that isn't sick yet. These I really want to save.

Is this leaf spot? My prunus carolinianas have it , but there a ways away. Do i need to remove every bad leaf and hope for the best... or is it worse than that?

Since none of them are related it must be environmental and not a disease. You might ask the neighbors if any of them have done any spraying lately. Not necessarily pesticides, it could even be fertilizer or pool chemicals.

It s look like a mineral deficiency it s not a disease
What is the ph of your soil or the type of soil??