Is Stz the short form of Schuetze?

It's highly likely that "Stz" is a shortened form of "Schütze," which is the German word for "shooter" or "marksman."

However, without context, it's impossible to say for certain. Here's why:

* Context is crucial: "Stz" could be an abbreviation for something else entirely.

* Variations in spelling: There might be other possible long forms with slightly different spellings.

If you have more context about where you saw "Stz," it would be easier to determine the full word.