There is a two-hour exemption on Friday to allow Muslim prayers and a five-hour window for Christians on Sunday.
Volunteers are going door-to-door, looking for people with signs of the disease and reminding others how to stay safe.
Dozens of new cases are still being reported in Sierra Leone every week.
The three West African countries worst affected by Ebola - Sierra Leone, Liberia and Guinea - have set a target of having no new cases by the middle of next month.
The outbreak has killed more than 10,000 people in the three countries over the past year.

Christina Sethi, 25, targeted three victims at a care home between January 2014 and May this year.
She filmed the assaults on her mobile phone before sharing them with her partner, Plymouth Crown Court heard.
Sethi, from Torquay in Devon, admitted three counts of sexual assault and two of assault by penetration last month.
Recorder Richard Stead told Sethi, of Woodville Road, that she had committed "horrific abuse of three vulnerable and elderly victims who were in a care home under your care".
He said she degraded and humiliated the victims who trusted her.
The abuse was discovered when a man who knew Sethi bought a computer and found footage of the attacks on deleted files.
Devon and Cornwall Police described Sethi's actions, against two female victims and one male, as "incomprehensible".
Det Insp Ed Wright said: "Sethi committed crimes that most ordinary people could never comprehend.
"This depraved individual carried out shocking acts of abuse and grossly abused her position at the care home."
A 32-year-old man from Torquay who was arrested on suspicion of conspiracy to commit sexual assault has since been released without charge.

The victim, who is in his 40s, sustained head injuries in the attack outside a licensed premises in Flax Street at about 05:25 BST.
He was taken to hospital and a police spokesman said he is "said to be in a critical but stable condition".
Det Insp Heather Whoriskey appealed to anyone who was in the area at the time to come forward with information.

Security forces were deployed on Monday morning and heavy gunfire was heard in the streets
The Ninjas were a major anti-government force in the 1997-99 civil war.
The violence comes weeks after Denis Sassou Nguesso won a third presidential term in a poll that the opposition said was marred by "massive fraud".
At least one police station and a government building were attacked in the Makelekele district.
The Ninjas were loyal to former Prime Minister Bernard Kolelas, the father of Guy-Brice Parfait Kolelas, who stood in the presidential election in March and got 15% of the vote.
Mr Sassou Nguesso, in power for more than 30 years, won the election with 60% of the vote.
Reuters news agency reports that on Monday morning young opposition supporters were chanting "Sassou, leave!" in Makelekele , which is in the south of the capital city.
The authorities in Sierra Leone are enforcing a three-day lockdown to curb the spread of Ebola, with the entire population ordered to stay at home.
[NEXT_CONCEPT]
A "depraved" care worker who sexually assaulted elderly patients and sent footage of the attacks to her boyfriend has been jailed for 10 years.
[NEXT_CONCEPT]
A man is critically ill after he was attacked by a number of people in an overnight assault in north Belfast.
[NEXT_CONCEPT]
The Congolese government has blamed attacks on government buildings in the capital, Brazzaville, on the Ninja militia group.