According to IMDb here is the Box Office for III
The Godfather: Part III (1990) More at IMDbPro »
Budget
$54,000,000 (estimated)

Opening Weekend
$19,558,558 (USA) (26 July 2012) (1,901 Screens)

Gross
$66,676,062 (USA)
£3,099,313 (UK) ( 1991)
$136,766,062 (Worldwide) (26 July 2012)
$136,766,062 (Worldwide)
$70,100,000 (Non-USA)
HKD 2,837,022 (Hong Kong) ( 1991)
ITL 2,054,663,000 (Italy)
SEK 10,555,964 (Sweden)

Admissions
148,170 (Sweden)

Rentals
$38,000,000 (USA)

Filming Dates
27 November 1989 - 25 May 1990

Copyright Holder
Paramount Pictures