A Department for Education (DfE) spokeswoman said: "No child should be held back from reaching their potential. Our SEND review will look at how we can improve the support children and young people with SEND currently receive so the system works for everyone, in every part of the country."
Cllr Marriott made the comment while launching a consultation on how the council can "better allocate" the government money it gets for the borough's "most vulnerable" youngsters.
The government provides funding for pupils in Newham with the highest special educational needs and disabilities.
The council expects to overspend on its high needs block - the pot of money that funds pupils with SEND - by £8.2m by the end of this financial year. This means that the Department of Education will order Newham to provide a budget recovery plan.
The National Audit Office reports that eight out of 10 local authorities overspent their schools high needs budgets in the year 2017-18.
The council has provided an extra £1.3m this financial year and for the following two years but the funding is still dependent on a grant provided by the Department for Education.
The town hall says changes are needed to ensure a better match between the individual needs of SEND children and the funding schools get, and to reduce the amount of overspend.
The DfE spokeswoman said: "We are increasing high needs funding for local authorities by £780 million next year, boosting the total budget for supporting those with the most complex needs to more than £7 billion in 2020-21."
The proposal only relates to pupils with high level SEND going to mainstream schools in the borough and does not affect pupils in special schools, resource provisions in mainstream schools and pupils attending schools outside Newham.
People can share their views until Tuesday, March 3. For further information visit newham.gov.uk/SHN