Hello, my name is ***** ***** I will be the licensed immigration attorney helping you today.
Unfortunately if he got deported then it will be difficult to return to the US because after deportation there is a ban from returning even if you had a valid visa. He will have to go to the US embassy/consulate and request a INA 212(d)(3) waiver also called the Hranka Waiver in order to have a chance to return to the US on a nonimmigrant visa. You can read more about it here http://www.nolo.com/legal-encyclopedia/applying-nonimmigrant-visa-hranka-waiver.html
Good luck to you during this process and I hope this answer has helped you!
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