Hello Borka!
I am happy to inform you that there are no direct grade requirements to study International Business. You do, however, need a high school diploma that is at least equivalent to the Dutch havo, vwo or mbo-4 diploma and proof of a sufficient level of English. Via this link (https://www.saxion.edu/studying-in-the-netherlands/application/admission-and-entry-requirements ) you can see whether this is the case. If so, you are good to apply. In case you have any uncertainty about this or studying in the Netherlands in general, feel free to get back to us or contact the International Office (internationaloffice@saxion.nl ).
I hope that helps!