West Germany's Michael Karst, the defending European Championships bronze medalist from Rome in 1974, rose to the fifth place, and tried unsuccessfully to pursue the lead group.
With about 600 metres left, Kantanen began to struggle, and he dropped decisively from the lead group early on the last back straight.
Baumgartl fought hard with Malinowski for the second place, and was able to pass the Polish steeplechaser fully by early on the final bend.
However, the East German steeplechaser timed his last jump a bit too late, hitting the final barrier with his right knee.
As Baumgartl fell to the track, Gärderud was able to sprint into a wider lead over Malinowski, who had to jump over the fallen East German.