Haskell was ruled out of the Allianz Park match-up yesterday due to a foot injury and was given permission by Director of Rugby Dai Young to attend the Royal Wedding in Windsor.
He was invited by the newly appointed Duke of Sussex, a keen rugby union fan and patron for the RFU.
The back row forward is due to leave Wasps for Northampton Saints this summer and his loyalty and commitment were questioned by BT Sport pundits, Lawrence Dallaglio and Austin Healey.
“It would be poor form really, wouldn’t it,” Dallaglio said about Haskell attending the wedding, rather than showing his face at the rugby.
“He should be here with his team-mates. I’m sure Harry wouldn’t mind, he loves his rugby.”
Dai Young jumped to the defence of his flanker and stated: “It was my decision. James has a nasty foot injury and is probably another couple of weeks away from doing anything. The royal wedding is a once-in-a-lifetime opportunity.
“I don’t think he’s done anything wrong. He’s supported the players as much as he can and he shouldn’t be criticised too much."
Wasps, who finished third in the Premiership, ended up losing a high-scoring affair as Saracens defeated them 57-33. Owen Farrell kicked 27 points, Chris Wyles scored a fifth semi-final try in eight years and the 11 tries and combined points were all records.
Austin Healy was also keen to express his concern that Haskell was absent from the semi-final: “Injury or not, he should be here. I can’t understand that.
“At Leicester, when you know it’s your last season and you played there or if Northampton are in the semi-finals and you were injured you would still be here. You would want to be in the changing room, you would want to be here."
Haskell was not the only guest attending the wedding of rugby fame, with 2003 Rugby World Cup winners Jonny Wilkinson and Sir Clive Woodward also seen arriving alongside other sporting figures such as David Beckham and Serena Williams.
Although Haskell would not have been able to make an impact on the pitch, he is somewhat of an emotional leader within the group and his mere presence on the sideline and in the dressing room could have helped the team find a way to halt the record-breaking Saracens offence.