Middlesex have confirmed that India all-rounder Yuvraj Singh will now not be joining them for this summer's Twenty20 Cup.
The Panthers had hoped to pair Yuvraj with former Australia great Adam Gilchrist, but renewed international commitments mean that will not be possible.
Chief executive Vinny Codrington told the county's official website: "We have advised representatives acting on behalf of Yuvraj Singh that we will not be signing him for Middlesex in this season's Friends Provident t20 campaign.
"We had received a signed contract from Yuvraj confirming that he was playing for us. We had received full approval from his agent as to the terms of our agreement and we had received full approval from a prominent member of the BCCI as to Yuvraj's signing.
"We were quite rightly awaiting written approval from the BCCI before formally announcing the signing to members at large and to the UK media, which unfortunately despite much chasing on our part was never forthcoming.
"We finally learnt earlier this week, only by reading the news on a third party website, that the BCCI have now organised a triangular tournament between themselves, Sri Lanka and Zimbabwe between the 28th May and the 13th June.
"Therein making Yuvraj unavailable for Middlesex in any of our t20 matches at Lord's in June."