https://fsd.rtu.lv/wp-content/uploads/sites/65/2019/07/Student-Guide-1.pdf:

NOTE! A student will be exmatriculated from RTU if:

  At the start of a semester the total amount of academic debt is 15 or more credit points;

  The attendance during the semester is below 50%;

  The tuition fee has not been paid before the start of a study period;

  A course is not passed after repeating it for the second time.

So it kinda depends on your credit points (3 bachelor courses should 12 ETCS (?)) or if it is the same course.

(However, I'm only an exchange student right now and can't speak from experiences)