Greetings!

3 day SSB procedure which is also called as DENOVO SSB is under testing stage as of now. it is undergoing trials at SSB Banglore and are likely to be implemented soon but no official announcements have been made yet. So i would suggest you that do not worry about the duration of SSB as it hardly matters how long it is because testing purpose will be the same which is to find out officer like qualities in you. The proposed changes for DENOVO SSB are as followed.

• Screening tests which is day1 in current ssb would be done online.
• Number of questions in psychological tests will be shortened.
• Some physical tests are to be included.
• Themetic apperception test (TAT) would be replaced by Situation Apperception test (SAT) with 9 pictures instead of 12
• Self description test would be eliminated.
• Some minor changes in GTO tasks are proposed in order to reduce the time.

So just focus on developing the officer like qualities and the process hardly matters. Stay updated with the official website.

I hope this was helpful. Thank you!