There is a battle royale mode for battlefield 3 : r/battlefield3

GAMING 24X7 - BattleField 6 : New Leaker reconfirms Battle Royale, 128 Players + a never heard before Cross-Game-Mode This comes straight from the BF6 subreddit. Leaks - Battle Royale is confirmed

EA Reiterates New Battlefield Game for 2021, Reveal in Spring

How does this 12 year old game still look so good? : r/battlefield3

Battlefield 2042, Battlefield Wiki

Journalists Respond to Battlefield 3's Rough Launch – SideQuesting

Battlefield 3 warns of possible bans for joining hacked games

Steam Workshop::Operation Firestorm (Battlefield 3)

Battlefield 2042: Portal Mode Has Already Been Used to Make a Battle Royale - IGN

Battlefield 3 Battle Royale Mod Map, Ping, Loot System and More Revealed - MP1st