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Trains between London and Sevenoaks will not be stopping at Knockholt until at least 5pm due to a broken step on the footbridge.
Trains will run non-stop between Chelsfield and Dunton Green as engineers attempt to fix the problems.
The issue with the footbridge is on the Sevenoaks-bound platform and was reported shortly after 9am.
Southeastern advises customers who require Knockholt to get off at Sevenoaks and take a London-bound train back.
A spokesman for Southeastern said safety checks are being carried out and the problem will be sorted as soon as possible.