This is what mine look like except very small.
I wonder if its tomato spotted wilt virus. I couldn't find anything else that fit its description after several searches.
Hopefully someone will come along & let us know
Good luck
Tonia

I read on a different forum (can't remember where) that often times after a lot of rain, fungal spores can settle on your plant and cause spotting similar to what I seen in your picture. I'm not positive about that, so you might want to look up fungus' on tomatoes. Good luck.

Hi,
I had the same problem and yes it will spread to the whole plant and all your tomatoes. It's a Fungus, and it will kill you plants very fast. Thanks to Sharon Love Joy's book Trowel & Error, I found a recipe for diluted milk that saved my plants. I used a 3:1 solution(3 parts water, 1 part milk). First I trimmed off all the affected leaves/branches ( this will make your tomatoes look like scarecrows, but it's the only way)-Dont compost the diseased foliage.
Then spray with diluted milk for several days. I do it in the shade but early enough that the plants have time to dry before evening coolness sets in.

My plants are saved! I cant believe it worked!

BTW I live in coastal (June Gloom) CA, in case you were wondering about the plants locale.

Hope it works for you,

Ziggy

I don't think it's fungus disease, or a virus.

Have the plants gone wilty at any point, even just a little bit?

If so, the tissue was killed but didn't recover even though the plant perked up when you watered.