Fisher-Price concurred with the CPSC's warning and noted that the reported deaths showed some parents and consumers are still using the product when infants are capable of rolling and without using the three-point harness restraint.
Fisher-Price had previously warned that babies older than three months had fallen out of the sleeper and died.
The CPSC is recommending consumers stop using all models of the rock 'n play when the child is three months old, or as soon as the baby can roll over.
The deaths have prompted only warnings from the company and the CPSC, which does not have a mandatory safety standard for infant inclined sleep products.
The Rock 'n Play Sleeper is a seat that includes vibrations and an incline to help babies sleep.
Fisher-Price told CR in an emailed statement, "The loss of a child is a devastating tragedy".
"Fisher-Price and every one of our employees take the responsibility of being part of your family seriously, and we are committed to earning that trust every day", he explained. The company, however, maintains that the sleeper still meets worldwide safety standards and that the safety instructions warn parents whose children can sit or pull themselves up on their own not to use the product.
Safe sleeping is always a top-priority concern for new parents.
"The ACCC urges parents with this product to keep it out of reach of children", the spokesperson tells her.