Hi there, thanks for writing to us on AskGuru.
Unfortunately, the minimum rental period for HDB flats is 6 months. You may refer to HDB's link here: https://www.hdb.gov.sg/cs/infoweb/residential/renting-a-flat/renting-from-the-open-market/regulations-for-renting-out-your-flat
You may look to rent a private property instead as the minimum rental period is 3 months. You may refer to URA's link here: https://www.ura.gov.sg/Corporate/Property/Residential/Renting-Property
You may browse our listings to connect directly with agents who have units that suit your budget and requirements.
Hope this answers your question.