World Rugby has postponed several tournaments and World Cup qualifiers due to the coronavirus outbreak, while June's Olympic qualifiers are under review.
Men's and women's World Cup regional qualifying events, Sevens Series tournaments in London and Paris, the women's Sevens Series tournament in Langford and the final men's Sevens Challenger Series event have been postponed.
World Rugby said they were consulting with the International Olympic Committee (IOC) in case they are unable to go ahead with the 12-team Olympic Games repechage qualification tournament scheduled for 20-21 June.
"We are in close dialogue with the IOC relating to the conclusion of the Tokyo 2020 Olympic Games rugby sevens qualification, specifically options to replace the final repechage tournament, should that be required," World Rugby chairman Bill Beaumont said in a statement.
"We have two women's and one men's teams left to qualify and are currently considering all options to ensure a fair and credible conclusion to the qualification process."
The World Rugby Under-20 Championship that was to be held from 28 June - 18 July in northern Italy has been cancelled after discussions with the Italian rugby federation.
The English Rugby Football Union (RFU) meanwhile have followed the IRFU's lead and announced the end of domestic rugby for the 2019-20 season, with an exception made for the Gallagher Premiership.
All league, cup and county rugby in England has been cancelled.
Twickenham is keen to "assist with long-term planning and provide clarity to the game at a time of continuous change" as sport attempts to shape a response to the Covid-19 pandemic.
"The implications for all areas of rugby will be thoroughly worked through and solutions discussed and developed with the clubs," said chief executive Bill Sweeney.
Meanwhile the 2020 Super Rugby season will stay alive in Australia with a domestic competition model and matches held at empty stadiums amid the coronavirus pandemic, Rugby Australia (RA) have announced.
The Super Rugby season was suspended after seven rounds due to travel restrictions by countries to contain the spread of the virus, which has killed more than 10,000 people worldwide since emerging in China late last year.
The halt of the franchise-based competition last weekend was a major blow for RA and partner unions in the southern hemisphere, which rely on broadcast revenues to support their domestic games.
Super Rugby is basically divided into three conferences, Australia, South African and New Zealand. Specifics of the draw and Finals Series were still to be worked out, RA said.
"We have agreed on the principles of proceeding down the path of a domestic solution in Australia which will see our teams compete against each other in a round-robin format from April through June, followed by a yet to be determined Finals Series format," RA Chief Executive Raelene Castle said.
Following the withdrawal of Japan's Sunwolves, who are part of the Australian Super Rugby conference, due to travel restrictions, RA said it had approached the Western Force to join the proposed domestic tournament.
The Perth-based Force were cut from the competition in 2017 as Super Rugby contracted to 15 teams from 18.
"While our focus has been on developing a competition model that will enable us to meet our commitments to fans and broadcasters, careful attention has also been given to ensure we are doing everything we can to protect the welfare of our players, support staff and match officials under the new proposed model," Castle added.