Lawrence was part of the
U-17 and
U-20 Canadian youth national teams and took part in the
U-17 World Cup in
2010 and
2012 as well as the
U-20 World Cup in
2014. She made her debut for the
Canada senior team against
China PR during the
2013 Four Nations Tournament on January 12. She took part in the
2013 Cyprus Cup. On November 26, 2014, she was in the starting line-up for the first time in the 1–1 draw against
Sweden. She played in the
2015 Four Nations Tournament. She made another starting appearance in the
2015 Cyprus Cup final against
England, which was lost 1–0. She was called up to the squad for the
2015 World Cup hosted by her own country, where she was in the starting line-up for the opening game and also played in the subsequent games. In the last group game against the
Netherlands she scored 1-0 and thus her first international and World Cup goal. She and her team were eliminated in the quarter-finals against
England. After the 2015 World Cup, Lawrence took part in the
2015 Pan American Games with the
U-23 team, which also took place in her home country and where the Canadians took fourth place. In December 2015, she took part in the four-nation tournament in Brazil with the senior national team, where Canada took second place. She was also part of the squad for the 2016 Summer Olympics qualifying tournament, where Canada qualified. She was used in all games and was only not in the starting line-up in the 10–0 win against
Guatemala, when some regular players were rested. In the first game against
Guyana, she scored three of Canada's five goals. She was named to the tournament's all-star team as the best left midfielder. In 2016, she was named to the Olympic team squad for the
Summer Games in Rio de Janeiro in August, where she played in all six games (one substitution) and won the bronze medal with the national team. On May 25, 2019, she was nominated for the
2019 World Cup. She was used in the Canadians' four games and didn't miss a minute, but her team was eliminated in the round of 16 against
Sweden, who later came third. In June 2021, Lawrence was nominated for the
Olympic Games, which were postponed by a year due to the COVID-19 pandemic. At the games she was used in the six games and was only substituted nine minutes before the end of the game in the third group game against
Great Britain. On August 2, 2021, she played her 100th international match for Canada in the semi-final against the
USA. At 116:56 of the Olympic final, she cleared away a Swedish cross on her own goal line to prevent a header goal. Canada went on to win the match in the penalty shoot-out, winning the gold medal with her team. At the
2022 CONCACAF W Championship, she was used in the three group games, the semi-finals, and the final. By reaching the semi-finals, the Canadians qualified for the
2023 World Cup in Australia and New Zealand. But in the final they lost again to the USA. On July 9, 2023, Lawrence was nominated for the 2023 World Cup. She played in each of her team's three games, and was eliminated with her team after the preliminary round by
Australia. Lawrence was called up to the Canada squad for the
2024 CONCACAF W Gold Cup, which Canada finished as semifinalists. Lawrence was called up to the Canada squad for the
2024 Summer Olympics. ==Personal life==