Is there any point in diversifying my investments when the capital that I'm starting out with (eg: 3,000) to invest is not even high enough?

If you get an ETF or a UT, you are already diversifying.

So if your capital is not high enough, you will just want to start with one of these two asset classes.

I'd probably stick with UT as they can have zero transaction costs on the right platform.

I usually don't fo for ETF. I usually choose to invest in good quality company. 3 years back when i just started out, i spend some money to invest in myself 1st. I use to buy investment related books to equip myself with investment knowledge.

Then i started to buy into a few companies after researching them based on knowledge that i have acquired from books. I started to buy into 2 companies and for few months, the share price didn't move much.

At the same time, i continue to read and look for some other sources to speed up my knowledge and sharpen my skills. I started to go for some free courses and as well as paid ones to learn from the expects. This really speed up my investing journey.

Why is that so, this is because i learnt from others painful experience so i do not repeat it.

Why am i saying all this thing is because i feel for a new investor who wants to invest in the market, 1st must really invest in yourself 1st. Get the necessary knowledge before putting your hard earned saving into the market.
Hope this helps!

But if you already have investment knowkedge, no point to diversity into too many companies for the sake of diversifying. Putting 3k into 2 high quality company can make a better returns than into ETF.

If you want diversification with a small capital-- there is only one answer STI-ETF

It is one holding which has diversified itself into 30 of Singapore largest companies across various industries

Yes, you can invest in a group of funds, e.g. ETFs or robo-advisors that helps you to diversify your investments AND also gain dividends, and you don't have to pay expensive fees!

You can even invest with just $100/month with POSB-ETF, so your $3,000 investment fund is a decent amount. Unless you are considering just 1 blue-chip stock, then definitely $3,000 is not high enough.