The free teaser can be downloaded on PlayStation 3, Xbox 360 and PC through digital download service Origin.
The beta features the Rush mode, which has players attack and defend bases on the Operation Metro map set in the streets around Paris's stock exchange.
Also available will be Battlelog, a social network that tracks and shares statistics with other players to be viewed in-game, online and on mobile devices.
The beta went live earlier this week for Medal of Honour Limited Edition owners and pre-order users on PC service Origin.
Battlefield 3 will launch on October 25 in North America and October 28 in Europe, two weeks prior to Modern Warfare 3's November 8 worldwide release.
> Battlefield 3 weapons, customisation revealed: Video
> Battlefield 3: Preview
Watch footage from the PC version of the Battlefield 3 beta below: