Commodore needed a 3d console out in 1993 to put Sony off
Commodore released the CD32 in September 1993 to compete with the Sega CD and the 3DO (which it did - for its short lifespan it was the top-selling CD platform in the EU). It was discontinued in April 1994 when Commodore went bankrupt.
The Saturn didn't hit Japan until November 1994 (mid-1995 in the US/EU) and the PlayStation didn't arrive in the US/EU until September 1995.
Neither the Saturn nor especially the PlayStation were implicit in the downfall of the Amiga/CD32 - that was all down to Commodore. As it was, they couldn't manufacture enough CD32s to meet demand because of their debt problems (they were having to pay for everything in cash).
