Possibly or possibly not. Depends if you mean the whole mount (including the metal bracket bits) or just the rubber bit with the threads on?
A quick look on ebay shows the same for both the IS200 and IS300 for the latter and that covers two engines (1F-GE and 2JZ-FE). http://www.ebay.co.uk/itm/LEXUS-IS200-I ... xy0uZR1EeM
That bit does look similar to the 3S-GE rubber mount with the two threads for the slots on the cross member BUT hard to say for sure from photo ALso the metal bit of the mount will almost certainly be different for all engines.