"Stitches" debuted at number 55 on the
Billboard Canadian Hot 100 on the chart dated April 4, 2015. It was the most-added song at Canadian
contemporary hit radio for the week of June 13, 2015, and debuted at number 50 on the
Canada CHR/Top 40 airplay chart for that week. Later, it re-entered the chart at number 40 and eventually peaked at number 10. In the United States, the song debuted at number 14 on the
Billboard Bubbling Under Hot 100 Singles on the chart dated April 25, 2015. It rose to number two on the Bubbling Under chart for the week of June 6, 2015, before debuting on the
Billboard Hot 100 proper at number 89 for the chart dated June 13, 2015. On the week ending August 27, 2015, the song entered the top 40 at number 35, climbed seven positions from number 42. The song jumped 12 spots to enter the top 20 at number 20 for the week ending September 10, 2015. The song entered the top 10 at number nine for the chart dated October 17, 2015, and climbed to number eight on the following week. On the week ending October 31, 2015, it entered the top 5 at number four, becoming Mendes' highest-peaking song on the chart at the time until it was surpassed by "
Señorita" which reached number-one in August 2019, as well as his first top 5 hit. "Stitches" debuted at number 36 on the
Billboard Mainstream Top 40 chart for the week ending June 20, 2015, becoming his first US airplay hit. It has since peaked at number one on the chart, becoming his first number one hit. It was certified 6× Platinum by the
Recording Industry Association of America (RIAA) in September 2017 and has sold 2.7 million downloads as of September 2017. The song spent a total of 52 weeks on the
Billboard Hot 100 before dropping out on June 11, 2016. In Sweden, "Stitches" entered the
Swedish Singles Chart on the chart dated April 3, 2015, at number 92. It gradually rose up the charts and reached number 58, before dropping out a few weeks later. As it was getting more successful worldwide, "Stitches" re-entered the chart at number 79 on the week ending July 3, 2015. The song peaked at number two on the week ending October 9, 2015, making it the song's best chart performance in any region so far. In the United Kingdom, "Stitches" debuted at number 98 on the
UK Singles Chart in August 2015. Eventually, it entered the top 40 in December of the same year, and on January 22, 2016 – for the week ending date January 28, 2016 – it dethroned
Justin Bieber's "
Love Yourself" from the top of the chart, finishing just over 1,500 combined chart sales ahead. In Australia, the song debuted at number 48 on the
ARIA Singles Chart on the chart dated October 26, 2015. It later peaked at number 4 on the chart dated December 7, 2015. The song was certified Platinum by
Australian Recording Industry Association (ARIA). ==Music video==