Looks like the Spanish minor at UNT requires 21 total credits of Spanish courses, including 9 of advanced courses.
https://spanish.unt.edu/undergraduate/minor-spanish
If there are three advanced Spanish courses that you want to take anyway, then you will pick up the minor in the process:
https://spanish.unt.edu/undergraduate/undergraduate-classes
The question is, are there three advanced Spanish courses that are sufficiently interesting to you that you want to take them anyway?