Editing Scarlets (section)

===Heineken Cup / European Champions Cup===
{| class="wikitable" style="text-align:center"
|-
! Season !! Pool/Round !! Pos !! Played !! Won !! Drawn !! Lost !! Bonus !! Points
|-
|rowspan="2"|[[2003–04 Heineken Cup|2003–04]]
|Pool 4||1st||6||5||0||1||3||23
|-
|Quarter-final
|colspan="7"|Llanelli Scarlets 10–27 '''[[Biarritz Olympique]]'''
|-
|[[2004–05 Heineken Cup|2004–05]]
|Pool 3||3rd||6||2||0||4||5||13
|-
|[[2005–06 Heineken Cup|2005–06]]
|Pool 6||3rd||6||2||0||4||4||12
|-
|rowspan="3"|[[2006–07 Heineken Cup|2006–07]]
|Pool 5||1st||6||6||0||0||3||27
|-
|Quarter-final
|colspan="7"|'''Llanelli Scarlets''' 24–15 [[Munster Rugby|Munster]]
|-
|Semi-final
|colspan="7"|'''[[Leicester Tigers]]''' 33–17 Llanelli Scarlets
|-
|[[2007–08 Heineken Cup|2007–08]]
|Pool 5||4th||6||0||0||6||0||0
|-
|[[2008–09 Heineken Cup|2008–09]]
|Pool 4||4th||6||1||1||4||2||8
|-
|[[2009–10 Heineken Cup|2009–10]]
|Pool 6||2nd||6||4||0||2||1||17
|-
|[[2010–11 Heineken Cup|2010–11]]
|Pool 5||3rd||6||3||0||3||3||15
|-
|[[2011–12 Heineken Cup|2011–12]]
|Pool 1||2nd||6||3||0||3||3||15
|-
|[[2012–13 Heineken Cup|2012–13]]
|Pool 5||4th||6||0||0||6||2||2
|-
|[[2013–14 Heineken Cup|2013–14]]
|Pool 4||3rd||6||2||1||3||1||11
|-
|[[2014–15 European Rugby Champions Cup|2014–15]]
|Pool 3||4th||6||2||0||4||0||8
|-
|[[2015–16 European Rugby Champions Cup|2015–16]]
|Pool 3||4th||6||0||0||6||2||2
|-
|[[2016–17 European Rugby Champions Cup|2016–17]]
|Pool 3||3rd||6||2||1||3||1||11
|-
|rowspan="3"|[[2017–18 European Rugby Champions Cup|2017–18]]
|Pool 5||1st||6||4||0||2||5||21
|-
|Quarter-final
|colspan="7"|'''Scarlets''' 29–17 [[Stade Rochelais|La Rochelle]]
|-
|Semi-final
|colspan="7"|'''[[Leinster Rugby|Leinster]]''' 38–16 Scarlets
|-
|[[2018–19 European Rugby Champions Cup|2018–19]]
|Pool 4||3rd||6||1||0||5||3||7
|-
|rowspan="2"|[[2020–21 European Rugby Champions Cup|2020–21]]
|Pool A||5th||2{{efn-la|Due to the [[COVID-19 pandemic in Europe]], only two pool games were played during the [[2020–21 European Rugby Champions Cup|2020–21]] season. The knockout stage commenced with a round of 16 consisting of the top eight teams from each pool.}}||2||0||0||1||9
|-
|Round of 16
|colspan="7"|Scarlets 14–57 '''[[Sale Sharks]]'''
|-
|[[2021–22 European Rugby Champions Cup|2021–22]]
|Pool B||12th||4||0||1||3||0||2
|}
{{reflist|group=n}}