Yes you can combine the quarterly on 5/18. Unfortunately only a dash (not assessed) applies to the interviews. Since you have up to the ARD to conduct interviews, you can document - "Interviews due but not completed by 5/18. Resident transferred to hospital."
On the other hand, you can schedule the quarterly on return (maybe a Sig change too). If resident received IVF or IV med in hospital, you can capture them within the required time frame.