Six is said to be taking legal action against Laser, who played the sinister Dr Heiter in 2009's cult horror The Human Centipede (First Sequence), after the German actor reneged on an agreement to appear in the third instalment.
In a statement released to Fangoria, producer Ilona Six said: "Because of the success of The Human Centipede, it seems that Mr Dieter Laser's ego has grown to laughably big proportions.
"First signing the contract and rating the Human Centipede 3 script as fantastic, and then demanding his own unacceptable script changes, and now refusing to play the part only seven weeks prior to shooting.
"Six Entertainment Company will start legal action against Dieter Laser. Tom Six says not to worry - principal photography will be postponed and will take place later this year."
Horror website Shock Till You Drop speculates that the feud could be an early publicity stunt for the movie. However, Laser issued Screen Read a response to Six's statement, claiming that he was delivered a script after weeks of delays.
Laser said that he "couldn't identify with the character the way it was written and developed" and made several suggestions to overhaul the story.
"That was too much for Tom and since he couldn't live with my suggestions and I as a method actor couldn't identify with his version, I told him that I couldn't see any other way than that he would have to 'change horses'," Laser explained. "That's it."
The Human Centipede II (Full Sequence) was banned by the BBFC last year due to its graphic nature, but later granted an 18 certificate for UK release.
The horror made just £942 on its opening weekend in cinemas last November.
> The Human Centipede 2 available uncut in UK and Australia
Watch a trailer for The Human Centipede II below: (WARNING: GRAPHIC CONTENT)