How does Romeo learn about Juliet's death? What are the events that lead up to Juliet's death?
Without knowledge of the arrangement between Juliet and Friar Laurence, Balthasar sees Juliet being buried in Capulet’s tomb. Balthasar automatically assumes Juliet is really dead. In act V, scene i, Balthasar rides to Mantua to tell Romeo of Juliet’s recent passing. The letter explaining the strange circumstances was detained due to the quarantine so Romeo was never able to learn about the lengths Juliet has gone through to be with him.
In Act V, Scene 5, Balthasar watches the body of Juliet put to rest in the mausoleum of the Capulets. He then speeds to Mantua to tell Romeo of this tragic incident. Meanwhile, Friar Laurence had sent a letter to Romeo telling him about the plan for Juliet to awake, but the Friar that was bringing the letter to Romeo was delayed and Balthasar beat the Friar there.
Romeo learns of Juliet's supposed death from Balthasar in Act V, Scene 1. Friar Laurence had sent Friar John with a message for Romeo to let him know that Juliet was in fact still alive, but it did not reach Romeo in Mantua in time because Friar John was quarantined.