ESL have announced the teams invited to the closed qualifiers and details for the upcoming open qualifier for IEM Sydney.

ANZ QUALIFIER

Teams announced for the ANZ region are: Athletico, Corvidae, Chiefs, Tainted Minds, Order & Greyhound

3 slots for IEM Sydney 2018
2 open qualifiers (unlimited slots, single elimination bo1 with final match being bo3, winner of each goes to closed qualifier)
1 closed qualifier (8 slots, double elimination, 6 teams invited + 2 from the open qualifiers)

ASIA QUALIFIER

 
Teams announced for the Asia Qualifier are: Tyloo, MVP PK, Flash Gaming, Signature Gaming, Boot Dreamscape, The Mongolz

3 slots for IEM Sydney 2018
2 open qualifiers (unlimited slots, single elimination bo1 with final match being bo3, winner of each goes to closed qualifier)
1 closed qualifier (8 slots, double elimination, 6 teams invited + 2 from the open qualifiers)
List of countries allowed to participate in the Asia qualifier can be found here.
For more details including the schedules for the qualifiers see the IEM Sydney website