Winds of over 35mph in Amsterdam led to a two-hour stoppage due to "oscillating balls", extending play deep into the evening for a second successive day after Thursday's storms.
Lagergren was already safely round in 68 for an eight-under-par halfway total, which proved too much for the chasing pack to match in tough scoring conditions.
Syme followed up his opening 65 with a one-over-par 72 to reach five under, good enough for third place behind first-round leader Ricardo Gouveia.
Fellow Scot Ramsay was also one over for his round with one hole to play when darkness descended, sharing fourth place with France's Pierre Pineau on four under.
England's Sullivan shot 70 to reach three under alongside Francesco Laporta, who also had one hole to complete, and Oliver Lindell.
Another Englishman, Dan Brown, had finished day one in a share of third place after matching Ramsay's 66 but fell off the pace on Friday with three double bogeys, including at the second and third holes. His eventual 79 left him only just inside the cut line at three over.
It was not a good day for Australians, Jason Scrivener following his opening-round 68 with a 75 that left him nine off the lead. David Micheluzzi is 10 over after repeating a 76 and Daniel Gale is 16 over following his 75 while Danny List withdrew.
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