Instead, Samoa – twice World Cup quarter-finalists – scraped through thanks to a 13-13 draw with Belgium in Dubai on Tuesday night.
"It wasn't all pretty but we managed to get the ticket to the World Cup," Samoa captain Theo McFarland said.
"To be fair, Belgium gave it to us all game."
Samoa and Belgium both beat Brazil and Namibia in their earlier games but the Pacific Islanders finished one point ahead of their European rivals with 12 after earning an extra bonus point.
Samoa, who have participated at every tournament since 1991, were favourites against Belgium but trailed 6-3 at halftime in the UAE after Matias Remue kicked two penalty goals.
A try by Abraham Papali'i, converted by Jacob Umaga, and an Umaga penalty gave Samoa a 13-6 cushion with 10 minutes left.
But when the TMO ruled that Belgium captain Jean-Maurice Decubber had burrowed over the line with six minutes remaining, and Remue converted, it set up the tensest of finishes.
When the whistle blew at the Sevens Stadium, the draw meant that Samoa edged through by a single point in the four-strong qualification group.
Samoa's team included former Australia prop Scott Sio, who switched international allegiance after 74 Tests for the Wallabies and who came on after 47 minutes.
"We're really sad. I think we deserved it. We worked very hard for it in this game and I feel sad for the team," Decubber said.
"We did a good tournament, we really thought we could get to the World Cup. There is a lot of disappointment."
Samoa qualified at their third attempt in three months. Depleted squads in August and September couldn't win a match and opponents Tonga, the United States and Chile progressed.
The draw for the pool stage of the 2027 Rugby World Cup will take place in Sydney on December 3.
THE 24 NATIONS THAT WILL PLAY AT THE 2027 WORLD CUP:
Argentina, Australia, Canada, Chile, England, Fiji, France, Georgia, Hong Kong, Ireland, Italy, Japan, New Zealand, Portugal, Romania, Samoa, Scotland, South Africa, Spain, Tonga, United States, Uruguay, Wales, Zimbabwe.
With agencies.
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