Asia-focused Standard Chartered said its operating profit grew at a low single-digit rate so far this year.
Its third quarter performance was hammered by the poor performance of its South Korea business and falling emerging-market currencies.
Income for the third quarter dropped by a low single-digit percentage from a year earlier, the bank said in its quarterly trading update today.
The bank, listed in both Hong Kong and London, does not publish third-quarter profit figures.
StanChart has had a hard time in South Korea, where a government scheme is allowing more forgiveness on debts, since acquiring First Bank in 2005 for $3.3 billion. The bank has also been hit by a broad slowdown in Asia.
The bank, which makes more than 90% of its profit in Asia, Africa and the Middle East, said the performance of its South Korea unit pushed down the profit of the group's entire consumer banking division.
The bank also expects a non-recurring tax-related cost in South Korea of $60m for the full year. In August, StanChart said it would take a $1 billion hit on the value of its Korean business.
Excluding the weak performance in South Korea, StanChart's income and profits in the consumer banking division rose by a high single-digit percentage, it said.
A consistent performer throughout the financial crisis, Standard Chartered has been buffeted by a slowdown in key Asian markets such as Singapore and India.
Exposure to Asian currencies has been a further drag, as the weak Indian rupee and Indonesian rupiah translate to lower reported US dollar earnings.
Based on current exchange rates, StanChart said, it expects depreciation of those currencies to have a full-year impact of around $200m on income and $70m on profits.
Other factors weighing on the bank's results include an estimated $260m from the UK banking levy, and a $340m settlement with a New York regulator over Iran-related laundering charges.