Badminton upheld its ban on Russian and Belarusian players in international competitions Thursday, days before Olympic qualifying begins.
Meanwhile, modern pentathlon said it would set up a "pathway" for athletes from the two countries to return but didn't commit to a date.
Badminton's qualifying period for the Paris Olympics next year starts May 1 and uses a calendar-year ranking.
The Badminton World Federation cited security concerns and the need for "more clarity" on the International Olympic Committee's "complex criteria" to admit some Russians and Belarusians as neutral athletes without national symbols but keep excluding others, such as military personnel or those who have supported the invasion of Ukraine.
"The guiding principle is that athletes should always be allowed to participate in sport competitions without judgement of their passport and separate of any geo-political conflict outside the control of the sports movement," the BWF said. "However ... BWF is not convinced there is satisfactory justification to lift the suspensions on Russian and Belarussian players and officials at this time."
The IOC also recommends allowing athletes from Russia and its ally Belarus to compete individually and not in team sports or "team events in individual sports." That raises the prospect in badminton of players being allowed to play singles but not doubles as a national team, a point the BWF did not address directly in its statement.
The recommendations from the IOC last month aren't binding on sports' governing bodies, which can implement them as they wish. The IOC has said it hasn't made a decision on what happens at the Paris Olympics.
Modern pentathlon's governing body, known as the UIPM, said it would follow the IOC recommendations but didn't set any timetable. It will be up to an "independent panel" to decide when and how Russians and Belarusians are readmitted, the governing body said.
"It is our firm belief that sport should be politically neutral and now, more than ever, must act as a vehicle for peace and a symbol of solidarity between athletes," the UIPM said.
Other Olympic sports that have followed the IOC and said they want to allow Russians and Belarusians to compete as neutral athletes include wrestling, taekwondo and triathlon. Athletics, weightlifting and equestrian have all maintained bans.
The Associated Press and Reuters contributed to this report.