Do visas for students get rejected if the applicants have brothers and sisters in America?
This is an individual situation. The decision depends on a case-by-case basis. If the US consul feels you are trying to get into the US in the guise of a student, with the possible support of your siblings in America, your application may be rejected. Likewise, if your brother or sister had gone to the US on an NIV (Non Immigrant Visa) and adjusted that status to permanent visa, you become a ‘risk candidate’. It will then be left to the judgment of the interviewing officer to decide.