 Farrell returned from the aforementioned knee injury on 25 November 2018, featuring off the bench in Munster's 2018–19 Pro14 round 9 fixture against Italian side Zebre.He scored two tries and earned the Man-of-the-Match in Munster's 44–14 win against Edinburgh on 30 November 2018.Farrell earned his first senior international call-up in October 2017, being named in the Ireland squad for the 2017 Autumn Internationals.