Those images are too blurry for a good identification. Any chance of seeing something a bit more focused?

Not a bacteria problem.

Are the spots very flat on the leaf?

Or are they 3-D, as in small round balls or squares? (If so, = poops of caterpillar eating something above that leaf.)

What does the entire plant look like? (Need image, please.)

I have one poor sad basil that gets attacked all the time by critters, so there it sits sacrificing it's leaves. In desperation, I planted another basil on the drip system in the side yard, and so far the critters haven't found it! It's in a pot, sitting kind of high, so I'm thinking this could be the only way to go for me with basil. I hate sharing my good basil with any other than critters of the two legged kind.