S3 announced a long while back. Premiers in July.
If they keep using that 'Atsushi gets mistaken for a molester' joke, I'm not interested. That joke got used a little too much in the first season (edit: though fortunately a bit less in the second season) and it got extremely old.
For one thing, Tiff is not on any level what I would call a typical American. She's not what I would consider a typical person. I don't know any other genius geneticist anime-fan martial artist marksman model-level beauties, do you?