In that case, if you're ENTER is above this year's Clearly-In, then you will get your first preference regardless and will not receive any other offers in any subsequent rounds.
However, if you really want your third preference then you can apply for an Irregular Offer.
How would i apply for an irregular offer?
The form will be available in MyInfo.
1. You simply fill out the form.
2. Contact the selection officer at the respective university for the course you want to get into.
3. Ask them if they are willing to accept you (ie. if they have any more places left).
4. If yes, then you simply give them form
in person (this is the safest thing to do) and ask them to sign it. Once you and the selection officer have signed it, then it is means they have officially accepted you.
However, not all selection officers know if a place is available. Should that occur, the selection officer may take down your name and contact details and will contact you should a vacancy arise.
Also note that if you apply for an Irregular Offer, you forfeit the right to be considered for any other offers listed on your preferences.