MSCI's benchmark emerging market stocks index fell almost 1 percent after some of the big Asian manufacturers tumbled in the wake of a sharp slide in US tech giants Amazon , Apple and Facebook on Friday.
South Korea's Samsung Electronics lost 1.5 percent and Taiwan Semiconductor Manufacturing Co fell 2.1 percent, moves reflected in the broader indices.
The Korean bourse fell 1 percent, Taiwan fell 0.9 percent and Hong Kong slipped 1.2 percent. China's Shanghai Composite also fell 0.6 percent. Electronics shipments have led an export revival for many of Asia's trade-reliant economies.
The Korean won weakened 0.5 percent to three-week lows after the central bank chief said the bank would maintain its record low interest rate of 1.25 percent.
Emerging Europe also opened lower with Polish shares leading the fallers, down over 1 percent, while the zloty underperformed its eastern European peers against the euro, down around 0.2 percent.
The European Union has lifted visas for Ukrainians, a move that could lead to tightening in the Polish labour market where nearly a million Ukrainians work.
Guillaume Tresca, senior emerging market strategist at Credit Agricole, said markets were awaiting this week's US Federal Reserve meeting, at which it is expected to raise interest rates.
"The rate hike is priced in. The question will be about the next hike and the tapering of the balance sheet," he said.
If the Fed hints it is ready to hike faster than previously anticipated, it could trigger a correction in emerging markets, which have benefited from stong inflows this year, Tresca said.
The average yield spread of emerging market bonds over US Treasuries on the JPMorgan Global Diversified index is around 298 basis points, a one-month low.
Qatari assets stabilised on hopes that the Middle East's diplomatic crisis will be resolved, as Kuwait tried to mediate. Qatar's neighbours cut diplomatic ties and transport links last week.
Qatari stocks rose 0.2 percent after dipping to their lowest level since January 2016 last week and ending the week down 7 percent, their worst performance since December 2014.
Qatar's 2026 dollar-denominated eurobond edged up 0.5 cents off multi-month lows whilst five-year credit default swaps narrowed 1 basis point from Friday's close to 107 bps, according to IHS Markit data.
Qatar's finance minister said the state could easily defend its economy and currency against sanctions, although the riyal remains under pressure against the dollar in the one-year forwards market.
The one-year forward rate stands at around 545 points after blowing out to 630 points last week, the highest since December 2015. Dollar shortages hit Qatar exchange houses on Sunday, as foreign banks scaled back business with Qatar institutions.
"Given the uncertainty around the likelihood of a short-term convergence of diplomatic views, and the impact of the current sanctions on the capital flow dynamics in Qatar, we maintain a more cautious view on the sovereign curve," analysts at Citi said in a note, adding the bank is underweight Qatar bonds.
The Turkish lira strengthened 0.5 percent against the dollar and stocks gained 0.4 percent after data showing the Turkish economy grew 5 percent in the first quarter, beating forecasts. The current account deficit also came in lower than forecast.
"Today's figures make it more likely that the central bank will resist pressure from the government to lower interest rates," analysts at Capital Economics said in a note.
The South African rand firmed 0.4 percent after Moody's downgraded the country's credit rating but kept it at investment grade on Friday. Moody's is the only major agency to rate South Africa investment grade (IG).
"It's not a gamechanger, they are still one notch above S&P and Fitch," said Tresca. "You just need one IG rating to remain in the main bond indexes. So far it's OK ... but if they downgrade further it would have big implications, leading to outflows."