The International Monetary Fund's Managing Director, Christine Lagarde, has said that she would not rule out another financial crisis in her lifetime, indicating that comments made recently by Federal Reserve Chair Janet Yellen may have been premature.

"There may, one day, be another crisis," Lagarde told CNBC Tuesday on the sidelines of a joint conference with the IMF and the Croatian National Bank in Dubrovnik.

Lagarde's comments responded to a statement made by Yellen a fortnight earlier in which she said she does not expect to see another financial crisis in her lifetime.

"I plan on having a long life and I hope she (Yellen) does, too, so I wouldn't absolutely bet on that because there are cycles that we have seen over the past decade and I wouldn't exclude that," Lagarde said.

She, however, noted the unpredictability of financial crises and said that finance ministers and policymakers should act with caution to prepare for such eventualities.