In a Sunday statement, Sabic said it decided not to continue with negotiations for the planned complex after the "relevant parties did not reach a deal on the fundamental conditions for this project."
No specifics on the differences were disclosed.
The project was expected to be a partnership with Sinopec Corp., one of China's three major state-owned oil companies.
Sabic announced a year ago that it hoped to develop the methanol plant in Trinidad.
Trinidad Energy Minister Kevin Ramnarine did not immediately return calls for comment.
The twin-island Caribbean nation is the second biggest energy producer in the Caribbean after nearby Venezuela.
