Mauricio Pochettino's team threw away a 2-0 aggregate lead to exit the Champions League at Real Madrid in midweek, prompting fury on its return to domestic action.
Messi and Neymar were roundly jeered during PSG's 3-0 Ligue 1 win over Bordeaux, even when Neymar tapped home the team's second goal after a move which included a sublime defence-splitting pass from Messi.
Messi has not enjoyed his finest campaign since arriving in the French capital, scoring just two goals from 60 attempts (18 of them on target) in Ligue 1 this season, although he has hit the woodwork eight times in the league, more than any other player in the top five European divisions.
The treatment of his former Barcelona team-mates prompted Atletico Madrid striker Suarez to show support on his Instagram story, accusing the fans of having "no memory".
"As always, football has no memory," the 35 year-old wrote alongside a picture of the three players.
"[I'm] always with you. I love you."
The Messi-Suarez-Neymar 'MSN' trio enjoyed a fruitful relationship in their time with the Catalan giant, hitting a combined 81 LaLiga goals in a stunning 2014-2015 season. They led the Blaugrana to the LaLiga, Copa del Rey and Champions League titles in that campaign.
Neymar's goal against Bordeaux means he has scored eight Ligue 1 goals against it, more league goals than he has managed against any other team since arriving in Europe in 2013.
The dominant victory at Parc des Princes also means that PSG has won seven of its nine Ligue 1 games immediately after a Champions League exit since its Qatari takeover in 2011.
