The chief executive of the automaker Stellantis, Carlos Tavares, has resigned, the company said on Sunday, amid a decline in profits and slumping sales in its key North America region. Mr. Tavares, 66,

Carlos Tavares, who had been under fire and was expected to leave at the end of his contract, resigned abruptly on Sunday.

Stellantis NV CEO Carlos Tavares resigned Sunday amid the automaker’s recent declining profits, sharply falling sales this year in the United States and mounting criticism from dealers and unions in recent months.