Peter Moore announced on the EA blog that Battlefield 4 will enter an open beta for PS3 and all other current generation platforms on October 1st.
The beta will be offered to those who pre-ordered three days ahead of when the general public can start playing. As of right now we don’t know it October 1st is the pre-order beta date or the general public beta date.
Battlefield 4 will be available October 29th for PS3 and other current gen platforms. The game will be available on the PS4 on launch day of the console in North American and Europe.