The WTA Tier III tournaments were Women's Tennis Association tennis third-level tournaments held from 1990 until the end of the 2008 season. The line-up of events varied over the years due to tournaments being promoted, demoted or cancelled.[1]
From 2009, most Tier III and Tier IV tournaments from previous seasons became WTA International Tournaments owing to a category change.[2] The main reason for the changes was to ease the pressure on players in terms of the number of tournaments that they were required to play.[3]
| Tournament | Complete sponsored name | City(s) | Country | Court surface | Tier III from | Years | Current/ Defunct | |
|---|---|---|---|---|---|---|---|---|
| VS of Houston | Virginia Slims of Houston | Houston | Clay | 1990 | 1 | |||
| Tampa | Eckerd Open | Tampa, Florida | Clay | 1990 | 1 | |||
| Newport | Virginia Slims of Newport | Newport | Grass | 1990 | 1 | |||
| San Diego | Toshiba Classic | San Diego | Hard | 1990 - 91 | 2 | |||
| San Antonio | New Haven Open at Yale | San Antonio | Hard | 1990 - 92 | 3 | |||
| Sydney | New South Wales Open | Sydney | Hard | 1990 - 92 | 3 | bgcolor=#ddddff; | Current | |
| Leipzig | Sparkassen Cup | Leipzig | Carpet (i) | 1990 - 92 | 3 | |||
| Barcelona | Barcelona Ladies Open | Clay | 1991 - 92 | 2 | bgcolor=#ddddff; | Current | ||
| Lucerne | European Open | Lucerne | Switzerland | Clay | 1992 - 94 | 3 | ||
| Osaka | Asian Open | Osaka | Carpet (i) | 1992 - 94 | 3 | |||
| Budapest | GDF Suez Grand Prix | Budapest | Carpet (i) Clay | 1993 2007 - 08 | 3 | bgcolor=#ddddff; | Current | |
| Kitzbühel | WTA Austrian Open | Kitzbühel | Clay | 1993 | 1 | |||
| Schenectady | OTB International Open | Schenectady | Hard | 1993 - 94 | 2 | |||
| Brisbane | Danone Hardcourt Championships | Brisbane | Hard | 1993 - 94 | 2 | |||
| Linz | Generali Ladies Linz | Linz | Carpet (i) | 1993 - 97 | 5 | bgcolor=#ddddff; | Current | |
| Oklahoma City Memphis | Cellular South Cup | Hard (i) | 1993 - 2008 | 16 | ||||
| Strasbourg | Internationaux de Strasbourg | Strasbourg | Clay | 1993 - 2008 | 16 | bgcolor=#ddddff; | Current | |
| Tokyo Outdoor | Rakuten Japan Open Tennis Championships | Tokyo | Hard | 1993 - 2008 | 16 | |||
| Birmingham | Aegon Classic | Birmingham | Grass | 1993 - 2008 | 16 | bgcolor=#ddddff; | Current | |
| Quebec City | Challenge Bell | Quebec City | Carpet (i) | 1993 - 2008 | 16 | bgcolor=#ddddff; | Current | |
| Moscow | Kremlin Cup | Moscow | Carpet (i) | 1994 - 96 | 3 | bgcolor=#ddddff; | Current | |
| San Juan | Puerto Rico Open | San Juan | , USA | Hard | 1995 | 1 | ||
| Zagreb Bol | Croatian Bol Ladies Open | Clay | 1995 2000 - 2003 | 5 | ||||
| Jakarta | Danamon Open | Jakarta | Hard | 1995 - 96 | 2 | |||
| Warsaw | Warsaw Open | Warsaw | Clay | 1995 - 98 2002 - 10 | 5 | |||
| Luxembourg City | BGL Luxembourg Open | Luxembourg City |  Luxembourg | Carpet (i) Hard (i) | 1996 - 2004 2008 | 10 | bgcolor=#ddddff; | Current |
| 's-Hertogenbosch | Ordina Open | 's-Hertogenbosch | Grass | 1996 - 2008 | 13 | bgcolor=#ddddff; | Current | |
| Madrid | Madrid Open | Madrid | Clay | 1997 - 2003 | 7 | |||
| Gold Coast | Brisbane International | Gold Coast | Hard | 1997 - 2008 | 12 | |||
| Prague | ECM Prague Open | Prague | Clay | 1998 | 1 | |||
| VS of Boston | Virginia Slims of Boston | Boston, Massachusetts | Hard | 1998 | 1 | |||
| Cairo | Dreamland Egypt Classic | Cairo | Clay | 1999 | 1 | |||
| Sopot | Orange Warsaw Open | Sopot | Clay | 1999 - 2004 | 6 | |||
| Kuala Lumpur Bali | Wismilak International Commonwealth Bank Tennis Classic | | Hard | 1999 - 2008 | 10 | |||
| Vienna | WTA Austrian Open | Clay | 2000 - 04 | 5 | ||||
| Canberra | Canberra International | Canberra | Hard | 2001 | 1 | |||
| Doha | Qatar Ladies Open | Doha | Hard | 2001 - 03 | 3 | |||
| Bogotá | Copa Sony Ericsson Colsanitas | Bogotá | Clay | 2001 - 08 | 8 | bgcolor=#ddddff; | Current | |
| Acapulco | Abierto Mexicano Telcel HSBC | Acapulco | Clay | 2001 - 08 | 8 | bgcolor=#ddddff; | Current | |
| Hasselt | Gaz de France Stars | Hasselt | Hard (i) | 2004 - 06 | 3 | |||
| Cincinnati | Western & Southern Open | Cincinnati | Hard | 2004 - 2008 | 5 | bgcolor=#ddddff; | Current | |
| Guangzhou | Guangzhou International Women's Open | Guangzhou | Hard | 2004 - 08 | 5 | bgcolor=#ddddff; | Current | |
| Bangkok | PTT Bangkok Open | Bangkok | Hard | 2005 - 07 | 3 | |||
| Kolkata | Sunfeast Open | Kolkata | Hard (i) | 2005 - 07 | 3 | |||
| Istanbul | İstanbul Cup | Istanbul | Clay | 2005 - 08 | 4 | bgcolor=#ddddff; | Current | |
| Bangalore | Bangalore Open | Bangalore | Hard | 2006 - 08 | 3 | |||
| Bad Gastein | Gastein Ladies | Bad Gastein | Clay | 2007 - 08 | 2 | bgcolor=#ddddff; | Current | |
| Viña del Mar | Cachantún Cup | Viña del Mar | Clay | 2008 | 1 |
Years in the "surface" or "country" columns only refer to the period that the tournament was played on the surface or in that country as a Tier III tournament.