Clermont Auvergne's medical staff had been tipping that Jones would make a stunning recovery from an ankle injury suffered against Biarritz last weekend. He was included in the initial squad of 24 named to play Stade Francais Paris on Saturday, but didn't make the final cut.
'It's a pity I couldn't play, because we've got an incredible crowd in, the weather's perfect and these are the sorts of games everyone wants to play,' Jones said. 'I believe I could have played, but there are still a few doubts about the ankle. The only wish you have when you're injured is to get back playing as quickly as possible.
'I really thought I would be fit for this game, but it's obviously going to take a few more days.'
A Clermont club spokesman said Jones's ankle would be looked at on Wednesday, in the hope of playing him against Castres next weekend. The delay in his return is another setback for Wales coach Ruddock, who is spending more time looking at X-rays than training videos these days.
World-class prop Gethin Jenkins (shoulder) and gifted centre Gavin Henson (groin) have already been ruled out of the autumn internationals. Scrum-half Dwayne Peel will have an ankle operation on Monday and will out of action for at least a fortnight, although understudy Gareth Cooper started on the bench for the Dragons on Saturday night.
Centre Tom Shanklin (knee) came through the Blues' loss to Wasps on Friday night unscathed, while Lions backrower Ryan Jones (shoulder) returns for the Ospreys against Bath on Sunday.
Ruddock's biggest problem next month could be at hooker. Robin McBryde has retired from rugby because of on-going neck problems, while possible replacements Rhys Thomas, Matthew Rees and Gareth Williams are all twiddling their thumbs on the injury list.
On the good-news front, Scarlets backrower Dafydd Jones (finger) is making a faster-than-expected recovery and may be available for the autumn Tests, and captain Gareth Thomas's sore shoulder is not considered a problem.
WRU TV were on hand at the launch of a major new commercial deal with WRU and Mercedes-Benz South Wales (part of the Sinclair Group), which sees the family company become an official supplier to the Welsh Rugby Union
On the back of the recent Women's Rugby World Cup, the WRU has launched a revitalised Women's and Girls domestic seasonal structure, and the future is looking bright.
Go to www.wru.co.uk/tryourgame for more information
Roger Lewis talks to WRU TV at the announcement of a new £60 million Rugby Services Agreement (RSA) which provides a new and positive contractual relationship between the WRU and its four Regions for the next six years has been agreed.
The Welsh Rugby Union has announced a major new sponsorship deal with Gullivers Sports Travel which will make the UK's leading, and longest established, multi-sport tour operator, an Official Supplier for the rest of the decade.
Having taken part in seven World Cups as a player and coach, Liza Burgess hopes to go out in style this afternoon when Wales take on Australia in the Play-off for seventh and eighth place in the Women's Rugby World Cup in Paris.