It has been said before, but it seems the post is lost in the ocean of others !
the jump in the retail price from 2700 USD (at the time of the release) to 3500 USD is entirely due to the currency rate.
3 years ago, the US Dollar was around 105 to 110 Japanese Yen, since last year it plunged to around 75 / 80.
So in Japan 3500 USD now means the same as 2700 USD at the time, if not cheaper 
Selling the MK3 cheaper in US wouldn't make any sense for a Japanese company selling a made in Japan product...
So please people, get mad at bankers on this one, Canon is NOT milking the cow 
No. YOU are the one that failed to see the "lost post".
D800 -> 91k metering, flagship af. 36MP. prob 14 stop DR = $2700
5DIII -> 64 zone metering, ?flagship af, 22mp, prob less than 12 stop DR (I hope to god I'm wrong) = $3500.
DOES THAT MAKE IT CLEAR?
Save us the crap about USD/Yen and keep the brainwash to yourself. FYI, Nikon got hit harder by tsunami than Canon did.
sorry, i wasn't expecting so much "hate" here... i guess just having to wait a couple more hours makes everybody tense, but you should calm down, we are all friends here

anyway, i live in Japan and can only talk for what i see from here, maybe that's why we don't agree.
The comparison with the D800 is indeed appropriate to illustrate my point:
Nikon D800 (BODY only) is on pre-order in Japan, price varies from 300.000 JPY to 270.000 JPY .
That means from 3750 USD to 3375USD.
If anybody can get the D800 Body in US for 2700USD, that is extremely unfair to Japanese customers, but an insane good deal for US customers !
So, from a Japanese perspective, 3500USD (280.000JPY) for the 5Dmk3 would be the same as the D800.
therefore, totally normal.