The 25-year-old requires surgery for a chest injury after rupturing a muscle.
The WRU has offered to temporarily centrally contract top Wales players as uncertainty continues over the future of the European club game.
Regional Rugby Wales says it's "staggered and "bitterly disappointed" by Sunday's statement from the Welsh Rugby Union.
The Wales rugby side will wear a special symbol on the sleeves of their jerseys this weekend in support of former captain Matthew Rees, who is battling testicular cancer.
The Cardiff Blues hooker, known as 'Smiler', is taking time away from the game as he undergoes treatment.
The Wales squad, which is gearing up to face Argentina tomorrow, will wear a purple smiley face symbol in recognition of Rees' nickname and testicular cancer charities.
Centre Jonathan Davies and Prop Adam Jones have been ruled out of the rest of Wales' Autumn International campaign, the WRU have confirmed.
Davies left the field during Wales 15-24 loss to South Africa on Saturday after damaging a pectoral muscle during the build up to the Springbok's opening try.
Jones limped out of action in the first half of the same game after damaging a calf muscle.
The Chief Executive of the Welsh Rugby Union, Roger Lewis, said: "it is important that any player considering his future right now fully understands the level of support the WRU is prepared to offer."
He said the offer was made to the four regions on Monday.
There has been no formal response yet.
I want to make it clear to our players that we have full confidence in the future of the elite game in Wales.
It is important that any player considering his future right now fully understands the level of support the WRU is prepared to offer.
It would be inappropriate to go into details about any negotiations or discussions which rightly have to be concluded in private, but I respect the concerns of the players at a time when our talks on Europe are continuing.
– Roger Lewis, Group Chief Executive, Welsh Rugby Union
Our squad is about to embark on a demanding Autumn series of international games and it is vitally important that all of their minds are completely focused on the task in hand.
I shared this proposal with the Regional chairmen on Monday of this week and look forward to what I expect would be a positive response.
The WRU also says it is "confident that a positive outcome will be arrived at regarding the future of European rugby", although it will not comment on ongoing negotiations.
The Welsh Rugby Union has made an offer to the four regions to centrally contract their leading Wales players whose deals expire at the end of this season, while uncertainty over the future of the European competitions continues.
In a statement this morning, the WRU said it was reacting to the regions' "concerns about their ability to conclude their own negotiations with leading players who are approaching the end of their existing contracts", by immediately offering support.
It says: "Once the negotiations regarding the European tournament are successfully concluded the WRU would permit the regions to revert to the current position with the agreed contracts being reassigned back to them."
"The WRU has committed more than £33m to the four Welsh regions over the course of the next five years to retain players in Wales. The WRU is prepared to draw down from this £33 million investment immediately to secure the future of outstanding Welsh talent for Wales and assist the regions."
The move comes amid continuing debate over the future of the Heineken Cup and Amlin Challenge Cup, with English and French clubs looking to break away.
There have also been longer-term concerns about the ability of the regions to keep top players, with the likes of Jamie Roberts, Dan Lydiate and George North playing their club rugby in France and England, whose clubs have greater financial resources.
Senior Welsh players including Sam Warburton, Leigh Halfpenny, Adam Jones, Alun Wyn Jones and Jonathan Davies are all out of contract at the end of the season.
Warren Gatland will announce his Wales squad for the autumn internationals today. Wales take on South Africa on 9th November, before they face Argentina, Tonga and Australia in the fourth and final test on 30th November.
The South Africa test will be Wales' first outing as a national side since they suffered a 23-8 defeat to Japan in the second and final test of their summer tour.
The Welsh Rugby Union (WRU) says it is on target to be debt-free in eight years time.
It has published its annual report which shows it had a turnover of 61 million pounds during the last financial year.
The WRU says it's also ploughed a record 22 million pounds back into Welsh rugby at all levels.
The new manager of the Millennium Stadium, Mark Williams, says it is a "dream job" and a "privilege" to be in charge of Wales' leading sporting venue.
Williams will take up the post later this month, after leaving the army, where he is a Lieutenant Colonel.
A decorated senior army officer has been appointed as the new manager of Cardiff's Millennium Stadium.
Mark Williams, from Glynneath, is a Lieutenant Colonel in the Royal Welsh, and served in Northern Ireland, Bosnia, Kosovo and Iraq.
He was decorated for his actions in combat in Iraq, where he led Welsh soldiers on many missions into Basra in 2007.
Now 42, he joins the Welsh Rugby Union later this month on his retirement from the army.
In his new role, he will have responsibility for the operation of the Millennium Stadium, owned and operated by the WRU.
He replaces Gerry Toms, who stepped down in March from what he described as the best job in Wales.
Mark Williams said: "I am deeply honoured to be joining the WRU in such an important role and I relish the challenges and opportunities this represents for me. As a proud Welshman and rugby supporter I understand the important place the stadium holds in the whole psyche and culture of Wales."