Barnaby Joyce makes a LATE appearance in parliament after humiliating footpath video emerges – as his boss warns he wants to talk to him…

Barnaby Joyce has arrived back in Canberra after a video emerged of the Nationals MP sitting on a sidewalk in Canberra talking loudly on his mobile phone.

A video published by Daily Mail Australia on Friday showed the shadow cabinet member, 56, on the ground in inner Braddon after sitting on a planter and falling off late Wednesday night.

The former deputy prime minister could be heard mumbling on the phone as he lay flat on his back on the ground, including an outburst in which he said: 'dead f***ing c***'.

The video recorded on Lonsdale Street, which has since gone viral, has raised questions about the former deputy prime minister's suitability to sit on the opposition front bench.

Mr Joyce arrived in Parliament almost an hour after Question Time started on Monday, ahead of a meeting in the Nationals party room.

The Nationals MP said he admitted he had made a mistake.

“Look, I've clearly made a big mistake,” Mr Joyce told Seven's Sunrise program on Monday.

'There's no excuse for it.

“There's a reason… they say certain things happen to you when you drink (while on medication) and they were absolutely 100 percent right.”

Nationals leader David Littleproud said Mr Joyce had matters to work through but hoped he would return to work in the afternoon or later in the week – although the party meeting is scheduled for Monday.

“This is something he is deeply ashamed of,” Littleproud told Sky News.

'He has made it very clear that this is not normal behavior for him and that there are extenuating circumstances. Of course we will support him to ensure he gets everything he needs.”

Mr Littleproud had previously said he would speak to Mr Joyce about the behavior seen in the video, as well as his position on the opposition frontbench.

The government has called on the coalition to answer for Joyce's actions, with Finance Minister Katy Gallagher saying the situation was 'incredibly sad'.

“These things do nothing for the profession of politicians… it reaffirms, in the minds of people and the public, a negative association with politics, and I think that's a real shame,” she told ABC Radio.

'But personally I hope he gets the help he needs because it's a very unusual position for someone that age.'

Barnaby Joyce has returned to parliament for the first time since the video scandal

Mr Joyce looked embarrassed as he returned to Parliament on Monday

Labor MP Tania Lawrence said the Nationals MP's behavior was shameful.

“We are an example to our community, young and old, representing Australia to the international dignitaries and visitors we meet every week,” she told parliament.

'We are in the spotlight and we have to act accordingly. If that doesn't work, we must also understand that there is not a single member here who is irreplaceable.'

Sources told Daily Mail Australia the Nationals frontbencher was sitting on the large potted plant while having an animated phone conversation with his wife, Vikki Campion, when he fell off, 'rolled on the floor' and continued with his phone call.

Joyce later responded to the embarrassing clip, saying: 'If I had known there was someone with a camera I would have gotten up quicker.'

Joyce has since blamed mixing alcohol and medication for his behavior

His father-in-law, Peter Campion, labeled the politician a 'shocker' because he was taking a course of medication.

'He's working on something. I know when it comes to medicine he is a shocker,” he told Daily Mail Australia.

'Vikki is always at him to take them, but he doesn't.

“He forgets to take them, forgets to stay the course of whatever he's on.”

Mr Campion defended Mr Joyce, saying his son-in-law had received devastating family news on the day of the incident.

'He has already lost a brother to cancer, you have to start with that. “He had very bad similar news, which is not for me to reveal, but of the same magnitude and which affected him deeply,” he said.

Meanwhile, Joyce's ex-wife and mother of his four adult daughters, Natalie Abberfield, told Daily Mail Australia on Monday: “I hope he's doing well.”

'I'm not going to say more. It's his private life. I'm not in his life anymore.'

Barnaby Joyce is pictured with his wife Vikki Campion on Tuesday, the day before the Lonsdale Street scene. Her father, Peter, said the politician received devastating family news on the day of the incident