The index closed 2.5 points higher after plunging 24.3 points Friday.
Trading on the Ho Chi Minh Stock Exchange (HoSE), on which the index is based, fell 30% to VND16.97 trillion ($701.67 million).
The VN30 basket, comprising the 30 largest capped stocks, saw 14 tickers fell.
MWG of electronics retail chain Mobile World dropped 2.1%, followed by MBB of lender MB and SAB of brewer Sabeco, both fell 1.1%.
Ten blue chips gained, led by SSI of leading brokerage SSI Securities Corporation, up 2.9%, and GVR of Vietnam Rubber Group, which closed 2.8% higher.
Foreign investors were net buyers to the tune of VND465 billion, mainly selling VRE of retail real estate arm Vincom Retail and VNM of dairy giant Vinamilk.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, gained 0.54%, while the UPCoM-Index for the Unlisted Public Companies Market rose 0.13%.