From a member from another country, these is what she shared as to the content of her packet 3 and these are supposed to be sent out by mail to the embassy before scheduling medical and interview:
IV-15 Checklist
Information medical
Medical Questionnaire
DS-230-I Part I
DS-156
DS-156K
DS-157 for Males
The letter from USEM is not packet 3 but just a letter informing us that we are eligible to schedule an interview and etc. It does not contain documents that we need to mail out to embassy so I guess it still stands that the Philippines still don't have "packet 3" up to this time. Now aren't we glad that we don't have it? I am sure glad because it lessens the waiting time for us.
As for the people who just got approved or whose papers are still at the NVC, you could wait for this information letter from embassy or you could call NVC and ask them directly when did they or when will they forward your approved petition to USEM. When NVC gives you exact date, you can either track it through DHL online using tips from here (http://www.visajourney.com/forums/index.php?showtopic=115441) or you could give it one week from that exact date before calling to schedule your interview appointment.
See the date on my letter: April 3 and I received it just today April 9. we already had interview date April 1. So it is your choice, to wait for the letter or to call ahead once you know your papers are with the embassy already.
i hope we could stop calling this letter the packet 3, because it is not packet 3 and calling it as such just adds to the confusion of other people: Click to view attachment
My understsanding is that, packet 3 and packet 4 is the same, the only difference is the way the papers are handled. packet 3 is to be sent out to embassy while packet 4 is to be carried over during interview. I don't know if I am correct though. I sure hope somebody could share further explanation.
Good luck to us all and God be our guide.