Foxconn struck a deal in November to take a near-20% stake in the money-losing U.S. firm for up to $170 million.
It has since invested $52.7 million and is balking at purchasing additional shares, citing a breach of their agreement, Lordstown said.
"There is substantial doubt regarding our ability to continue as a going concern," Lordstown said in a filing, referring to its dispute with Foxconn over the investment deal.
Their course of conduct has resulted in material — and what is becoming irreparable — harm to the company," Lordstown said in a statement.
Lordstown shares, which at one point tumbled more than 50% on Monday, closed down 23%, or 12 cents, at 40 cents, in heavy trading.