Bulgaria’s central bank governor resigned on Tuesday, as the poorest country in the European Union slowly recovers from a banking crisis and remains vulnerable to developments in neighboring Greece.

Ivan Iskrov, who spent 12 years at the helm of the Bulgarian National Bank, said in a letter to Parliament that he will step down on July 10, three months before his term expires in October.

Mr. Iskrov has been under pressure from political forces to resign in the wake of what turned out to be the worst banking crisis since the 1990s. In June last year the country’s fourth largest bank was closed after reports that its main shareholder was embezzling funds from the lender prompted a bank run, which later spread to a second lender.

The central bank was widely blamed for mishandling the crisis and Mr. Iskrov offered to resign in July last year but later backtracked.

The $4 billion Corporate Commercial Bank, known by its Bulgarian initials KTB, was declared insolvent in April this year.