In an update on it blog the developer explained: "We are not satisfied yet with Dawnguard's performance on the PS3.
"We would like for everyone to have a chance to play Dawnguard, but we aren't going to release it for PS3 knowing that some people's experience in Skyrim will be worse.
"We do everything we can to have our content available to all; from our free updates, to user mods, to paid DLC. We're as disappointed as our fans when that isn't the case, but we'll continue to push for that reality."
Dawnguard launched on Xbox 360 on June 26 and hit PC last night. While it might feel like a tough wait for PS3 players, Bethesda's caution makes perfect sense given the serious problems the PS3 version of Skyrim suffered following its release last year.
"A worthy chunk of DLC that fills Skyrim's already packed world map with new gear, enemies, and quests," we said in our 8/10 Elder Scrolls V: Skyrim Dawnguard DLC review.