AUS v WI (W) (1)
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SA v NZ (W) (1)
Last week Dottin ended her West Indies career citing issues around the team culture and environment but added she would continue to play in various T20 leagues.
Dottin has previously played for Perth Scorchers and Brisbane Heat, making 424 runs in 29 matches with a top score of 60 not out alongside taking 17 wickets.
"Deandra is a match-winner who will bring big game experience and elite performance to Adelaide this summer," Strikers heads coach Luke Williams said.
"With more than 250 international appearances across T20 and ODI cricket, including multiple World Cups, as well as caps in the Hundred and WBBL, Deandra will be a fantastic addition to our squad."
Dottin said: "I am so excited to get to Adelaide and play in the WBBL again. The Strikers are a brilliant team and I hope I can help them take that extra step and bring home the title. I can't wait to meet all the fans and put on a show for everyone with my new teammates."
Meanwhile, Strikers will also be able to call on the top-order class Wolvaardt who continues her association with the team. Last season she scored 381 runs at 29.30 and a strike-rate of 121.33
However, Strikers have lost the services of pace bowler Sarah Coyte who has signed a two-year deal with Melbourne Renegades.
Coyte, who was capped 81 times across all formats by Australia, has taken 93 wickets in the WBBL from 91 matches and is renowned as one of the best death bowlers in the game.
"I'm looking forward to a new challenge," she said. "I think this Renegades group is an exciting one to be part of and when the opportunity presented to come across, I jumped at it. Hopefully I can continue my form in the Big Bash from the last couple of seasons."
"I like to keep things very simple. Hopefully I can add a bit of experience to the group with my bowling and through the lower order and also help some of the younger players to trust their skills out in the middle."
Meanwhile, Brisbane Heat are close to completing their WBBL squad after re-signed pace bowler Zoe Cooke and handing 18-year-old legspinner Grace Parsons her first contract.