Muslims in countries like India or Sri Lanka are not able to practice the basic pillars of Islam, what they can do?

It means you are saying that Islam is not suitable for every place. That is the obvious meaning. This is the other side of what you are saying. Even if you didn’t say in your word, this is what you are implying. In fact we know, Islam is suitable for anywhere. Obligatory prayers are obligatory in their times as long as you are conscious. There is no excuse unless you lose your consciousness. Or you are traveler; you have a lot to stop and going.

And, even in your circumstances, Prophet Muhammad sallallahu alayhi wasallam did join prayers of Dhuhr, Asr, Maghrib and Isha in Medina; not travelling, not being sick and not being in any special condition. He said that he did this to remove from us any difficulty.

So if you cannot pray on times, they you are allowed to pray Dhur along with Asr. Or if you are have difficulty praying Maghrib, there is times where you are allowed to pray Maghrib along with Isha. This is something you know ahead time and you have intention for. This should not become your daily pattern. This shouldn’t be your life of just praying 3 times a day. This is something else. We are talking about circumstances which will arise time to time. And in those circumstances you are allowed to do it, this is in Sahih Muslim and Prophet Muhammad sallallahu alayhi wasallam did this.

The prayer itself can be done standing or even sitting. It can be finished in few minutes. And, no matter what situation you find, you will have the opportunity to make the prayer, if you want to make it. Sometime people do not pray because they do not want non-Muslims to see them pray .So they do not want to pray. People may do this. There are varieties of reasons of why people do not want to pray. But if the person wants to pray, they will fear Allah and there will be a way, for sure. Going to the masjid is preferable, but it is not compulsory.