A statement to the Hong Kong Stock Exchange earlier on Tuesday announced that the businessman, who is awaiting the verdict in a trial for money laundering in Hong Kong, had stepped down from Birmingham International Holdings Limited (BIHL) - the company that owns City.
And Blues have now added that Yeung has also left all positions within the football club, including president.
A statement on the club's official website, bcfc.com, read: "Carson Yeung has today confirmed that he has resigned from his position on the boards of Birmingham City Football Club, Birmingham City plc and Birmingham International Holdings Limited."
Acting chairman Pannu added: "Carson Yeung has taken this decision to focus more time on his ongoing court case and to satisfy one of the requirements for the resumption of trading of BIHL shares.
"I will endeavour to update supporters further following the forthcoming EGM in Hong Kong.
"I would like to take this opportunity to thank Carson Yeung for his vision, dedication and generous support for the football club."
Yeung completed a takeover of Birmingham through BIHL in 2009. Since he took charge, Birmingham have won the League Cup but have been relegated from the Premier League and are currently in the bottom half of the Sky Bet Championship.
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- Carson Yeung
- Hong Kong Stock Exchange
- Birmingham City Football Club