Greg's advice below is good however - I see you're not interested anymore, but before you let it go, make sure you've got another "bird in hand".
Before you terminate your short sale contract you may want to review the present available home inventory. The available homes for first time home buyers is in short supply this spring. You just may have a good value in your short sale home. Do your research before you have a final change of heart.
RE/MAX Realty Group
It is likely that your house is located in a Home Owners Association. If you have not signed for any documents, then you likely can get out under the MD Homeowners Association Act and receive a full refund of the deposit. If you would like to give me a call at 301-502-5027 with the address of the property, I will be able to tell you if you are in a HOA and give you further mechanics of voiding the sale.
Lucy Kessler, Associate Broker Re/Max Realty Group
In order for you to get your Earnest Money Deposit back, you should call your Realtor and ask them to send you a Release or a Unilateral Notice of Termination. After you sign, it will be signed by the Seller. The Release is sent to the Company holding your money, then a check can be issued to you. If there are any issues causing the money to be held, contact an attorney.
I hope this helps.
Dottie Cordwell, Associate Broker
Keller Williams Realty Baltimore
Please ask your real estate agent or attorney to draw up a Release or Unilateral Notice of Termination. You can fill in the type of contingency and the date the contingency expired. You and the seller would have to sign and then submit to the party holding the deposit. You should then have your entire deposit returned (if that is how the contract reads). If you are not sure, check with your attorney.