| Competition: | Slovenian Third League |
| Season: | 2015–16 |
| Winners: | Ilirija (Centre) Beltinci (East) Brežice 1919 (North) Brda (West) |
| Promoted: | Brežice 1919 Brda |
| Relegated: | Žiri Jesenice Jezero Medvode Bakovci Črenšovci Radlje Podvinci Cerknica |
| League Topscorer: | Jernej Tkalec (30 goals) |
| Matches: | 681 |
| Total Goals: | 2261 |
| Biggest Home Win: | Bravo 12–1 Jezero |
| Biggest Away Win: | Črešnovci 1–11 Tromejnik |
| Highest Scoring: | Bravo 12–1 Jezero |
| Prevseason: | 2014–15 |
| Nextseason: | 2016–17 |
The 2015–16 Slovenian Third League began on 22 August 2015 and ended on 29 May 2016[1] [2] with playoffs being played on 4 and 8 June 2016.
The 2015–16 Slovenian Third League was divided into four regional groups with a total of 52 participating clubs. Three groups (i.e. North, Centre, East) were composed of 14 clubs, while the group West only had 10 clubs that were participating in the competition. The winners of the regular season in each group played a promotional two-legged play-offs to decide which two teams promoted to the Slovenian Second League. Reserve teams of the top division sides were ineligible to promote to the second division, due to the rules of the Football Association of Slovenia, which stipulated that one club's main squad and their reserve team must be at least two leagues apart in the country's football pyramid. Consequently, in case one club's main squad would get relegated from the top division to the second division their reserve team would be automatically relegated from the third division.
The number of relegated teams from each group was determined by the number of regional MNZ's from which the clubs in all four groups were a part of.
This meant that three teams from 3. SNL North were relegated at the end of the season and replaced by the winners of the fourth tier competitions held separately in MNZ Celje, MNZ Maribor and MNZ Ptuj. The number of relegated teams from 3. SNL Centre and 3. SNL East was two, while only the bottom team was relegated from 3. SNL West as MNZ Koper and MNZ Nova Gorica managed a combined fourth tier competition. The number of relegated teams was also determined by the location of teams which relegated from the second division.[3]
| Club | Location | Stadium | 2014–15 position | |
|---|---|---|---|---|
| Žiri | Polje Stadium | MNZG-Kranj, 3rd | ||
| Bled | Bled | Bled Sports Centre | 8th | |
| Brinje Grosuplje | Grosuplje | Brinje Stadium | MNZ Ljubljana, 2nd | |
| Bravo | Ljubljana | MNZ Ljubljana, 1st | ||
| Ilirija | Ljubljana | Ilirija Sports Park | 2nd | |
| Ivančna Gorica | Ivančna Gorica | Ivančna Gorica Stadium | 3rd | |
| Jesenice | Jesenice | Podmežakla Stadium | MNZG-Kranj, 2nd | |
| Jezero | Medvode | Ob Sori Stadium | 9th | |
| Kolpa | Podzemelj | Podzemelj Sports Park | 10th | |
| Komenda | Komenda | Komenda Hipodrom | 12th | |
| Lesce | Lesce | Na Žagi Stadium | 11th | |
| Rudar | Trbovlje | Rudar Stadium | 7th | |
| Sava | Kranj | Stražišče Sports Park | 6th | |
| Zagorje | Zagorje ob Savi | Zagorje City Stadium | 4th |
| Club | Location | Stadium | 2014–15 position | |
|---|---|---|---|---|
| Bakovci | Bakovci | ŠRC Bakovci | 12th | |
| Beltinci | Beltinci | Beltinci Sports Park | 2nd | |
| Čarda | Martjanci | ŠRC Martjanci | 10th | |
| Črenšovci | Črenšovci | Črenšovci Sports Park | 11th | |
| Grad | Grad | Igrišče Pod gradom | 4th | |
| Križevci | Križevci | Križevci Sports Park | MNZ Murska Sobota, 1st | |
| Nafta 1903 | Lendava | Lendava Sports Park | 9th | |
| Ljutomer | Ljutomer | Ljutomer Sports Park | 5th | |
| Mura | Murska Sobota | Fazanerija | 3rd | |
| Odranci | Odranci | ŠRC Odranci | 1st | |
| Rakičan | Rakičan | Grajski Park Stadium | 8th | |
| Tromejnik | Kuzma | Kuzma Football Stadium | 6th | |
| Turnišče | Turnišče | Turnišče Stadium | 7th | |
| Polana | Velika Polana | PC Poljana | MNZ Lendava, 2nd |
| Club | Location | Stadium | 2014–15 position | |
|---|---|---|---|---|
| Brežice 1919 | Brežice | Brežice Stadium | MNZ Celje, 1st | |
| Dobrovce | Miklavž | Dobrovce Sports Park | MNZ Maribor, 1st | |
| Dravinja | Slovenske Konjice | Dobrava Stadium | 2. SNL, 9th | |
| Dravograd | Dravograd | Dravograd Sports Centre | 4th | |
| Fužinar | Ravne na Koroškem | City Stadium | 6th | |
| Lenart | Lenart | ŠRC Polena | 10th | |
| Maribor B | Maribor | Tabor Sports Park | 1st | |
| Mons Claudius | Rogatec | Rogatec Sports Centre | 8th | |
| Podvinci | Podvinci | Podvinci Stadium | 3rd | |
| Radlje | Radlje ob Dravi | Radlje ob Dravi Stadium | 9th | |
| Šampion | Celje | Olimp | 7th | |
| Šmarje | Šmarje pri Jelšah | Sports Park | 5th | |
| Šmartno 1928 | Šmartno ob Paki | Šmartno Stadium | 2. SNL, 10th | |
| Videm | Videm pri Ptuju | Videm Sports Park | MNZ Ptuj, 1st |
| Club | Location | Stadium | 2014–15 position | |
|---|---|---|---|---|
| Adria | Miren | Pri Štantu Stadium | 8th | |
| Ajdovščina Škou | Ajdovščina | Ajdovščina Stadium | 1st | |
| Bilje | Bilje | Stadion V dolinci | 4th | |
| Brda | Dobrovo | Vipolže Stadium | 3rd | |
| Cerknica | Cerknica | Koleno Stadium | 9th | |
| Ilirska Bistrica | Ilirska Bistrica | Trnovo Sports Centre | 7th | |
| Izola | Izola | Izola City Stadium | 2nd | |
| Jadran | Dekani | Dekani Sports Park | 5th | |
| Tabor | Sežana | Rajko Štolfa Stadium | 6th | |
| Vipava | Vipava | Ob Beli Stadium | MNZ Nova Gorica, 1st |
A two-legged play-offs between the group winners for promotion to the Slovenian Second League.
Brda and Brežice 1919 were promoted to the Slovenian Second League.