The Gunners have agreed deals for props Allan Dell and Simon Berghan and outside back Nick McLennan.
New Zealanders Berghan and McLennan will check in this summer, while South African Dell is due to arrive in Scotland within weeks and could feature for the Murrayfield outfit before the season is out.
All three have Scottish ancestry and Edinburgh head coach Alan Solomons - who has already recruited heavily from the southern hemisphere - is confident the players will add to Scottish rugby.
He said: "Allan Dell is an outstanding talent. He is a good footballer, is very mobile, has good skills and a fantastic work rate.
"Simon Berghan is primarily a tighthead who has played for the Canterbury province in New Zealand's rugby heartland. He's a big strong boy who has every prospect of cutting it at a higher level.
"And Nick McLennan is a guy who has played a lot of ITM Cup rugby. He is a good footballer who is versatile, being equally at home at stand-off, full-back and wing."
Berghan and McLennan will arrive in the summer on deals to 2015 and 2016 respectively, while Dell has penned a two-and-a-half year deal.
Dell, 21 - who qualifies for Scotland through his Paisley-born grandmother - said: "I'm really excited to get to Scotland and start the next chapter of my career.
The whole opportunity is fantastic. Alan Solomons is an excellent coach so it's great to get the chance to work under him, compete for the chance to play for the club and, longer-term, for the chance to represent Scotland. "
Berghan, 23, was born in Christchurch, New Zealand but has Scottish blood through his Stirling-born grandfather.
"I'm delighted to get an opportunity to prove myself at this level," he said. " It's a professional contract at a great club that I just couldn't say no to. Everything I've heard about the club and city has been good so I can't wait to get out there."
McLennan, meanwhile, also qualifies for Scotland through his Scottish grandparents.
He said: "It's really proud moment for me and my family given my heritage. Having strong links with Scotland definitely made the move even more appealing, while the competitions the club plays in are world-class. Being involved in that will be something special ."