Final answer:
Pindarus's misreading of the battlefield leads to Cassius's death.
Step-by-step explanation:
In Act 5 Scene 3 of the play, the consequence of Pindarus's misreading of the battlefield is that he mistakenly informs Cassius that Titinius has been captured by the enemy. This misinformation leads Cassius to believe that all is lost and that he should take his own life. Pindarus's misreading of the situation ultimately leads to Cassius's death.