Can I withdraw NOIM form?

The NOIM is lodged with the Celebrant. If you cancel, nothing further happens to the form.

 NOIM remains valid for 18 months.

  If Bridal party totally do not want to proceed with the wedding none of the inforfmation will be shared with any other parties.

Just ask your celebrant to destroy all copies of the NOIM that are held and  ask the celebrant to delete the record that was created on the Department of State BDM portal (referred to as a 'draft' within the BDM online portal). 

When you complete the NOIM the information remains with the Celebrant until after the marriage ceremony.  If you request to cancel the wedding the celebrant can advise that the NOIM remains valid for 18 months.  If you totally do not want to proceed with the wedding none of your inforfmation will be shared with any other parties.  You will need to negotiate with your celebrant if any funds paid are refundable.  Lee

Certainly. 
Just ask you celebrant to destroy all copies of the NOIM that he is holding and to confirm that. 
And ask the celebrant to delete the record that was created on the State BDM portal and to confirm that.
If you are not satisfied with the celebrants answer then you can report the interaction to Marriage Law and Celebrant Section of the Attorney Generals Department.

I understand. Your celebrant will certainly understand your situation. The record can be deleted by the celebrant. It's also ethical to pay the celebrant the $175 NOIM registration and admin fee, which is the standard fee charged by the Victorian Marriage Registry Office. This fee covers the time they spend working with you on your wedding:)

In general the NOIM should not have been lodged as yet as the Celebrant lodges once they have married you. They may however have started to prefill the form in the Stakeholders Section with The RBDM, but will not have formally lodged as yet, so you should be fine in removing your name.

As far as I'm aware, you should be able to ask your celebrant to ring BDM, explain the wedding has been canceled, and remove the record from the system.  

Hi, I'm sorry to hear your wedding will not be going ahead. However the good news is that your celebrant can simply delete the information on your Notice of Intended Marriage (referred to as a 'draft' within the BDM online portal) and securely destroy copies of any ientification you have supplied. Just tell your celebrant the wedding has been cancelled.