(Reuters) - Restaurant Brands missed estimates for quarterly revenue on Tuesday, owing to weak demand across key businesses such as Tim Hortons, Burger King and international markets including China and the Middle East.

Total revenues for the three months ended September 30 came in at $2.29 billion, below analysts' expectations of $2.31 billion, according to data compiled by LSEG.

(Reporting by Savyata Mishra in Bengaluru; Editing by Devika Syamnath)