[1] In June 2017, after many weeks of media speculation, Munster confirmed that director of rugby Rassie Erasmus and Defence Coach Jacques Nienaber would leave their roles with the province and return to South Africa on 31 December 2017.

[3] In the provinces only pre-season fixture, Munster beat English side Worcester Warriors 35–26 in Sixways Stadium on 24 August.

[6] In the same month, it was announced that Munster's all-time leading try scorer, Simon Zebo, would leave the province at the end of the season.

[7] In Rounds 1 & 2 of the 2017–18 European Rugby Champions Cup in October 2017, Munster drew 17–17 away to Castres before earning a 14–7 win at home to Racing 92.

[16] In Rounds 5 & 6 of the Champions Cup, Munster lost 34–30 away to Racing 92 before beating Castres 48–3 at home, securing a record 17th quarter-final.

[17][18] Munster beat 3-time tournament champions Toulon 20–19 in the quarter-final after a late Andrew Conway try and conversion from Ian Keatley.

[21] In the semi-final against recently crowned Champions Cup winners and arch-rivals Leinster on 19 May 2018, Munster lost 16–15, bringing to an end their 2017–18 season.