Hyundai -- along with its smaller affiliate Kia -- forms the world's fifth largest automaking group.
Net profit for January to March amounted to 1.76 trillion won (USD 1.52 billion), down 11.6 per cent from a year ago, while operating profit also fell 15.5 per cent to 1.34 trillion won.
A prolonged slump in global oil prices hurt growth by dampening demand in some emerging markets, the company said in a statement.
Global car sales were down 6.4 per cent from a year before at 1.1 million units.
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Hyundai warned that uncertainties would persist for the rest of the year, with emerging and advanced economies both showing few signs of recovery.
To counter slowing sales, the firm said it would increase production of sports utility vehicles popular in emerging markets like China -- its key export market that accounts for about 20 per cent of total sales.
Hyundai sales in China fell 18.2 per cent in the first quarter, even as the Chinese auto market -- already the largest in the world -- expanded.