| Competition: | 3. Liga |
| Season: | 2017–18 |
| Pixels: | 225 |
| Dates: | 21 July 2017 – 12 May 2018 |
| Winners: | 1. FC Magdeburg |
| Promoted: | 1. FC Magdeburg SC Paderborn |
| Relegated: | Werder Bremen II Chemnitzer FC Rot-Weiß Erfurt |
| Matches: | 380 |
| Total Goals: | 1038 |
| League Topscorer: | Manuel Schäffler (22 goals) |
| Attendancecalc: | 2348630 |
| Prevseason: | 2016–17 |
| Nextseason: | 2018–19 |
The 2017–18 3. Liga was the tenth season of the 3. Liga. It began on 21 July 2017 and concluded on 12 May 2018.
The fixtures were announced on 4 July 2017.[1]
| Team | Manager | Captain | Kit manufacturer | Shirt sponsor | |
|---|---|---|---|---|---|
| VfR Aalen | Saller | Prowin | |||
| Chemnitzer FC | adidas | Ahorn Hotels | |||
| Rot-Weiß Erfurt | Jako | Thüringer Energie AG | |||
| SG Sonnenhof Großaspach | Hummel | Urbacher Mineralquellen | |||
| Hallescher FC |  | Puma | Halplus | ||
| Carl Zeiss Jena | Puma | Medipolis | |||
| Karlsruher SC | Jako | Klaiber Markisen | |||
| Fortuna Köln | Jako | HIT Handelsgruppe | |||
| Sportfreunde Lotte | Puma | FRIMO Group | |||
| 1. FC Magdeburg |  | Uhlsport | FAM | ||
| SV Meppen | Nike | KiK xxl | |||
| Preußen Münster | Nike | Tuja Zeitarbeit | |||
| VfL Osnabrück | adidas | Sparkasse | |||
| SC Paderborn | Saller | Mediacom | |||
| Hansa Rostock |  | Nike | kurzurlaub.de | ||
| SpVgg Unterhaching | adidas | Alpenbauer | |||
| SV Wehen Wiesbaden | | Nike | Brita | ||
| Werder Bremen II | | Nike | Wiesenhof | ||
| Würzburger Kickers | Jako | s.Oliver | |||
| FSV Zwickau | Puma | Zwickauer Energieversorgung |
| Team | Outgoing manager | Manner of departure | Date of vacancy | Position in table | Incoming manager | Date of appointment | |
|---|---|---|---|---|---|---|---|
| Chemnitzer FC | Sven Köhler[2] | Resigned | 30 June 2017 | Preseason | Horst Steffen[3] | 1 July 2017 | |
| Hansa Rostock | Uwe Ehlers | End of caretaker | Pavel Dochev | ||||
| Würzburger Kickers | Bernd Hollerbach[4] | Sacked | Stephan Schmidt | ||||
| SG Sonnenhof Großaspach | Oliver Zapel[5] | Resigned | Sascha Hildmann[6] | ||||
| Sportfreunde Lotte | Ismail Atalan[7] | Signed by VfL Bochum | 11 July 2017 | Oscar Corrochano[8] | 14 July 2017 | ||
| Oscar Corrochano[9] | Resigned | 27 July 2017 | 18th | Marc Fascher | 27 July 2017 | ||
| Karlsruher SC | Marc-Patrick Meister[10] | Sacked | 20 August 2017 | 15th |  (joint caretakers) | 20 August 2017 | |
| | End of tenure as caretakers | 29 August 2017 | 16th | [11] | 29 August 2017 | ||
| Rot-Weiß Erfurt | Stefan Krämer[12] | Sacked | 2 October 2017 | 20th | David Bergner | 2 October 2017 | |
| Würzburger Kickers | Stephan Schmidt[13] | 17th | Michael Schiele[14] | ||||
| VfL Osnabrück | Joe Enochs[15] | 4 October 2017 | 19th | Daniel Thioune[16] | 5 October 2017 | ||
| Werder Bremen II | Florian Kohfeldt[17] | Promoted to Werder Bremen | 30 October 2017 | 16th | Oliver Zapel[18] | 13 November 2017 | |
| Sportfreunde Lotte | Marc Fascher[19] | Sacked | 1 November 2017 | 16th | Andreas Golombek | 1 November 2017 | |
| Rot-Weiß Erfurt | David Bergner[20] | 20 November 2017 | 20th | Stefan Emmerling | 20 November 2017 | ||
| Preußen Münster | Benno Möhlmann[21] | 10 December 2017 | 16th | Marco Antwerpen[22] | 12 December 2017 | ||
| Chemnitzer FC | Horst Steffen[23] | 2 January 2018 | 19th |  Sreto Ristić (interim) | 2 January 2018 | ||
| Sreto Ristić[24] | End of caretaker tenure | 6 January 2018 | David Bergner | 6 January 2018 | |||
| Werder Bremen II | Oliver Zapel[25] | Sacked | 5 February 2018 | 19th | Sven Hübscher | 5 February 2018 | |
| FSV Zwickau | Torsten Ziegner[26] | Sacked | 25 April 2018 | 16th | Danny König (interim) | 25 April 2018 |
| Position | State | Number of teams | Teams | |
|---|---|---|---|---|
| 1 | 4 | Fortuna Köln, Sportfreunde Lotte, Preußen Münster and SC Paderborn | ||
| 2 | 3 | VfR Aalen, SG Sonnenhof Großaspach and Karlsruher SC | ||
| align=center rowspan=5 | 3 | 2 | SpVgg Unterhaching and Würzburger Kickers | |
| 2 | SV Meppen and VfL Osnabrück | |||
| 2 | Chemnitzer FC and FSV Zwickau | |||
| 2 | Hallescher FC and 1. FC Magdeburg | |||
| 2 | Rot-Weiß Erfurt and Carl Zeiss Jena | |||
| align=center rowspan=3 | 8 | 1 | Werder Bremen II | |
| 1 | Wehen Wiesbaden | |||
| 1 | Hansa Rostock |