Yes, there are three catalytic converters (and possibly a resonator).
One converter on each side after the exhaust manifolds and then the "2 in/1 out" that you describe.
You can remove the "2 in/1 out" one without any performance or CEL issues. If you remove the two primary ones, you'll throw a "catalytic converter out of tolerance" (or something like that) Check Engine Light.
But I can't address the legalities of emission changes in Sweden.
97 Lincoln Mark VIII LSC (Chip'd, 3.73 T/L... so far... )
97 Ford Aspire (Slow, but getting 36 mpg (f'n Ethenol!!
84 F250 Dually w/6.9L Diesel (7.3L IDI pending)
73 Mercury Cougar Convertible w/351C 4V (Partially Restored)
69 F100 LWB w/460 Engine
76 Glastron Carlson 23' Jet Boat w/460 CJ Engine