"Alstom and Siemens have just made fresh concessions to the European Commission," Le Maire told France Inter radio.
"There is no remaining justification for a refusal by the European Commission of the merger."
A source familiar with the matter said on Friday that the companies had added concessions to allay EU antitrust concerns.
(Reporting by Gus Trompiz and Danielle Rouquie; Editing by Kirsten Donovan)