The third season of the American dramedy television series Ugly Betty was confirmed in the ABC lineup, which was picked up for a full season on February 11, 2008. The season premiere aired on September 25, 2008 and ended with a special double-episode on May 21, 2009.

In Australia, Season 3 premiered on Tuesday, November 3, 2009 at 7:30 pm EDT. This took place as one of the first exclusive premieres on the new digital channel 7TWO, after over two years of erratic screening of the first two seasons on the Seven Network. In South Africa, Season 3 premiered on Tuesday January 13, 2009 in its normal 7:30.P.M CAT timeslot. Season 3 premiered in the UK on Channel 4 on Wednesday June 24, 2009 in the 10:00.P.M. slot, after Big Brother. It changed from Wednesdays to Mondays from Monday October 12, 2009. Episodes finished airing December 2, 2009.

The season would be the first to be produced in the show's setting, New York City in an attempt to take advantage of a credit change. However, the move would have side-effects as several cast and crew members prefer to stay in Los Angeles where the first two seasons were produced which resulted in contributing less onto the show. For example, Ashley Jensen, who plays Christina McKinney, opted to stay in Los Angeles and eventually left the show.

ゴールデン・グローブ賞受賞のアメリカ・フェレーラ演じるベティが、ニューヨークの街で最新ファッションとスキャンダルがいっぱいの「モード」編集部を舞台に大活躍する『アグリー・ベティ』のシーズン３。休暇でリフレッシュし、キャリアアップという新たな目標を胸に戻ってきたベティ。ところが「モード」編集部は、ますますエスカレートするウィルミナとダニエルの権力争いで大混乱。そんなめまぐるしい日々の中でもベティは、もうひとつの夢だったマンハッタンでの憧れの一人暮らしをスタートさせるが・・・。パトリシア・フィールドがスタイリストとして本格参加した今シーズンは、オシャレ度が更にパワーアップし、リンジー・ローハン、ラルフ・マッチオなど豪華なゲストスターの活躍も必見！より一層パワフルになったベティに訪れる新たな恋の予感、そして話題満載のファッション業界をドラマティックに描き出す、大人気スタイリッシュ・コメディ。