I don't think on the whole the rents are declining.

If anything, they are just rising less quickly. I think soon they will flatten out (stop rising) but I don't know when or if they will ever fall.

I would say that demand for housing has slowed, and the supply of apartments is exceeding the demand. There are fewer people willing to come to Qatar due to the weakening currency, high rent and high inflation, and also a lot of accomodation throughout Doha has recently been completed all at once.

If rents don't decline soon and substantially, the economy here will really suffer more than it is now.