Market downturns can feel unsettling, but they often create some of the best opportunities for long-term investors.

When high-quality assets decline in value due to short-term concerns, savvy investors can capitalise on the dip and position themselves for strong future gains. History has repeatedly shown that periods of market weakness are followed by recoveries, rewarding those who stay patient and invest strategically.

With this in mind, now could be a great time to snap up some beaten-down ASX exchange-traded funds (ETFs) that provide exposure to world-leading companies and high-growth sectors.

Below are three ETFs that have pulled back from their highs and could be compelling buys today. They are as follows:

Betashares Nasdaq 100 ETF (ASX: NDQ)

The Betashares Nasdaq 100 ETF provides exposure to some of the biggest and most innovative technology companies in the world. This includes industry giants like Apple, Nvidia, and Tesla, all of which are shaping the future of areas such as AI, cloud computing, and automation.

This ASX ETF has dropped 9% from its recent high, presenting an opportunity for investors to gain access to high-quality companies at a discount to what others were willing to pay only a matter of weeks ago. The long-term prospects for these businesses remain strong, with many continuing to deliver impressive revenue and earnings growth despite short-term volatility.

iShares S&P 500 ETF (ASX: IVV)

For those seeking broad market exposure, the iShares S&P 500 ETF could be a smart addition to an investment portfolio right now. This ASX ETF tracks the performance of the S&P 500, giving investors a stake in 500 of the largest publicly traded companies in the United States, spanning industries like technology, healthcare, and consumer goods.

The fund has fallen almost 7% from its recent high, due to broader market weakness rather than any company-specific issues. This could make now a great time to invest. Especially given that historically, the S&P 500 has delivered solid long-term returns for investors.

Betashares Global Cybersecurity ETF (ASX: HACK)

Finally, the Betashares Global Cybersecurity ETF could be one to consider buying. It offers exposure to a rapidly growing sector that is becoming increasingly vital in today's digital world. Cyber threats are on the rise, and businesses and governments are ramping up their spending on cybersecurity solutions to protect sensitive data and infrastructure.

This ASX ETF has declined by 8% from its recent peak, which could be an attractive entry point for investors looking to gain exposure to cybersecurity leaders such as CrowdStrike and Palo Alto Networks. With cybersecurity spending expected to continue growing in the coming years, this fund could deliver strong returns over the long term. It is for this reason that Betashares recently named it as one to buy.