How should I prepare for my consular interview when going from EB-5 to EB-3?

First, you need to surrender your existing status before they can issue a new green card. They may want to know more about the project and why it failed to see if you were in any way connected to the failure.

Other than the standard preparation for the EB-3 process, they may ask a lot about former immigration history and processes. They may ask why you changed, and did you have the proper intent on previous process.

Since you are a conditional permanent resident, you will need to execute Form I-407 to abandon your conditional LPR status and receive permanent status (immigrant visa) based upon the EB-3 case. There should not be any questions about your family''s I-829 case since it is not relevant to your EB-3 case, assuming no visa fraud of course.

You need to prepare to answer questions as to why you decided to give up your EB-5 status and what proof you have to show that you are eligible for EB-3. You should bring the petitioning package prepared by your employer for you.