College "Strongly Recommends" 3 Subject Tests

I took two subject tests; is it necessary that I take another Subject Test before I apply? How important is it for me to take another one?

Why would you bother to apply to a school if you don’t follow the advice about what they recommended? The strongest applicants will have 3 subject tests as recommended. Of course exceptions are made for kids with very limited income for whom the testing fees are an obstacle. But if testing fees are not an obstacle, then take 3 as recommended.

There’s only one school that recommends or requires 3 that I know of, and that is Georgetown. Which school is this?

If it’s georgetown, yes. They made this clear at their info session - “unless you have an absolutely outstanding application even without it”.