Those three countries are on very similar vectors for incidence of cases and total deaths (on a per capita basis, of course). You can see some very interesting, and alarming, statistical graphs in the following article:
https://www.vox.com/policy-and-politics/2020/3/13/21178289/confirmed-coronavirus-cases-us-countries-italy-iran-singapore-hong-kong
I'm not going to reiterate the article's points, because you can read it for yourself and draw your own conclusions.