Hello,

Yes, you will be allowed to enter the next semester even if you fail in 3 exams in your 4th semester in DU. These 3 failed exams will be considered as back paper which you will have to give again in your even semester till then your marksheet will have failed subjects and once your marks are replaced after giving your examinations, your marksheet will show a * that will indicate that you have appeared for the exam again.

Hope this helps,

Thank you