The remaining few days in the careers of the about-to-retire twin brothers are now out of their own hands.
The pair, playing for their home state of New South Wales in the Sheffield Shield competition, need their side to score an outright win over Queensland in Sydney if they are to have any chance of making the final later this month.
But that outcome is also dependent on Victoria, who head the competition, taking maximum points from Tasmania - who are second.
Victoria are already assured of a finals berth but both New South Wales and Queensland can potentially sneak past Tasmania if they score an outright win.
However torrential rain ruined the entire third day's play in the Tasmania versus Victoria match at Hobart's Bellerive Oval as well as the Sydney Cricket Ground game.
Victorian captain Darren Berry, whose team is still 89 runs behind Tasmania's first innings, is now expected to declared the innings closed and concede first innings points to his rivals in search of an outright win with one day remaining.
If he does, the season, and the careers of the Waugh twins, will be over after the current match.
"I can't control what they (Victoria) are going to do," said Steve Waugh, the New South Wales captain.
New South Wales are due to resume their first innings on Sunday on 196 for four, still 222 runs behind Queensland's 418 for nine(dec).
"There's enough time to get something happening," said Waugh. "It's not all over for us." But if the rain continues, the Waugh twins' goodbye match could be a wash-out.
"Cricket's like that," said Waugh.
"Don Bradman got a duck in his last dig. It doesn't always end the way you want. We've had a good run for 20 years. It's not going to make it any less worthwhile if the last day is washed out."
In Saturday's other match, South Australia, who made 300 in their first innings, were in a strong position at the end of the third day on 106 for one.
The South Australians, battling to avoid finishing last, were well-placed to overhaul their rivals who had made 335 and 302.
Sydney (day three): New South Wales 196 for four (M Bevan 79 not out S Waugh 65; D MacKenzie 1-40, A Bichel 1-44) versus Queensland 418 for nine dec).
In Hobart: (day three) Tasmania 341 versus Victoria 252 for seven. (Play washed out day three).
In Adelaide: (day three): South Australia 300 and 106 for one (B Cameron 48 not out, M Cosgrove 35 not out; D Wates 1-28) versus Western Australia 335 and 302 (B Hogg 75, D Wates 99; S Tait 4-59, P Rofe 3-70).
Quiet start for Waugh twins at Sydney