Italy's Monte dei Paschi di Siena said it had decided to postpone the approval of a new restructuring plan that is needed for the European Commission to approve its state bailout.
The plan was due to be released on Wednesday morning.
The bank, which did not set a new date for the approval, said in a statement the delay was due to the "need for the European Commission to complete formal procedural aspects."
The EU has requested that the Siena-based lender, founded in 1472, shed more jobs and branches, cut the salaries of its top managers and gradually wind down its €29 billion Italian government bond portfolio.
Monte dei Paschi is already cutting 4,600 jobs and shutting 400 branches under a previous turnaround plan which the EU thought was too soft.