No. 3 Security Forces Squadron (3SECFORSQN) was an RAAF Security Forces unit, whose mission was to provide security in support of air and space power assets and infrastructure.

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Originally designated No. 3 Airfield Defence Squadron (3AFDS), the squadron was disbanded in the mid-2000s and its resources dispersed between No 1AFDS (RAAF Edinburgh) and No 2AFDS (RAAF Amberley).^{[citation needed]}

On 4 July 2013, the RAAF's security capability was reorganised.^[1] Subsequently, No. 3 Security Forces Squadron was formed, with its headquarters based at RAAF Base Edinburgh.^[2][3][4]

On October 11th 2022, 3SECFOR was disbanded as part of the RAAF's Air Force Security Transformation program. During 2022, 1SECFOR and 2SECFOR were restructured with more specific responsibilities.

The unit comprised personnel from the following Air Force categories and musterings:

• Ground Defence Officer
• Security Police Officer
• Personnel Capability Officer
• Logistics Officer
• Airfield Defence Guard
• Air Force Security (Security Operations)
• Air Force Security (Military Working Dog Handler)
• Airbase Protection
• Personnel Capability Specialist
• Supply

• Squadron Headquarters. Based at RAAF Base Edinburgh, South Australia.
• RAAF Edinburgh Security Flight.
• Rifle Flight Group, comprising HQ, Rifle Flight x 2 and C4ISR Flight. Based at RAAF Base Edinburgh, South Australia.
• Airbase Protection Flight (Reserve personnel). Based at RAAF Base Edinburgh, South Australia.
• RAAF Pearce Security Flight. Based at RAAF Pearce, Western Australia.